Biggles Posted April 21, 2022 Report Share Posted April 21, 2022 Hello All So its been 10 years since the roof was painted and now it needs a strip off completely. This is not optional! Really it's not! I can get a lot of it off by just scraping and the rest I can get with angle grinder. I'm not going to get it back to bright shiny blasted metal I know so I am looking for advice on treatments ready for the top coat. The surface will be lightly pitted. Suggestions please. Link to comment Share on other sites More sharing options...
robtheplod Posted April 21, 2022 Report Share Posted April 21, 2022 Do you need to get all the paint off? When I did mine, i sanded down the whole roof so the existing paint acted as an undercoat, sanded down the rust spots and treated with Vactan, which also acts as an undercoat. One year later all seems fine... Link to comment Share on other sites More sharing options...
LadyG Posted April 21, 2022 Report Share Posted April 21, 2022 I kinda agree. The whole point is to find any rust. To make a really good job you remove the vents and all the clutter and sand down totally, else just find rust, sand, treat, then prime with a filler primer. Link to comment Share on other sites More sharing options...
ditchcrawler Posted April 21, 2022 Report Share Posted April 21, 2022 2 hours ago, Biggles said: Hello All So its been 10 years since the roof was painted and now it needs a strip off completely. This is not optional! Really it's not! I can get a lot of it off by just scraping and the rest I can get with angle grinder. I'm not going to get it back to bright shiny blasted metal I know so I am looking for advice on treatments ready for the top coat. The surface will be lightly pitted. Suggestions please. Nice to see you back on here. Not like you to do a half measure bodge Link to comment Share on other sites More sharing options...
David Mack Posted April 21, 2022 Report Share Posted April 21, 2022 3 hours ago, Biggles said: I can get a lot of it off by just scraping and the rest I can get with angle grinder. I started off with the idea of removing the loose paint and rust, then using rust converter on the rusty areas and sanding down the remaining paint elsewhere. But the orbital sander someone on here recommended wouldn't take the skin off a rice pudding and the remaining paintwork stayed rough and unven. So I ended up using a flap wheel in an angle grinder to get back to bare metal throughout. Slow as you only take off 1/2" wide strip at a time, but gave a clean metal surface, lightly textured and ideal for primer. Link to comment Share on other sites More sharing options...
ditchcrawler Posted April 21, 2022 Report Share Posted April 21, 2022 I watched a chap at Anderton stripping his roof with a heatgun and a multitool Link to comment Share on other sites More sharing options...
Slow and Steady Posted April 21, 2022 Report Share Posted April 21, 2022 (edited) These are good for paint removal - poly abrasive disc. 1/2 a day: IMO it's faster in the long run to take the lot off and get a level surface to paint on... unless it's just a few rusty area. I found once I started looking more closely there would have been more removed than left so I went for it. Edited April 21, 2022 by Slow and Steady 2 Link to comment Share on other sites More sharing options...
Bee Posted April 21, 2022 Report Share Posted April 21, 2022 Careful with that angle grinder! If you use one of them things you need to take it BACK to metal not INTO the metal! Link to comment Share on other sites More sharing options...
syd Posted April 21, 2022 Report Share Posted April 21, 2022 The job I hate the most, painting. Hope it is inside or bugfest springs to mind. Link to comment Share on other sites More sharing options...
nbfiresprite Posted April 21, 2022 Report Share Posted April 21, 2022 Find a nice handy bridge to paint under. As murphy's law means that as soon as you painted the roof, it will cloud over and rain Link to comment Share on other sites More sharing options...
Floaty Me Boaty Posted April 22, 2022 Report Share Posted April 22, 2022 (edited) 17 hours ago, Biggles said: Hello All So its been 10 years since the roof was painted and now it needs a strip off completely. This is not optional! Really it's not! I can get a lot of it off by just scraping and the rest I can get with angle grinder. I'm not going to get it back to bright shiny blasted metal I know so I am looking for advice on treatments ready for the top coat. The surface will be lightly pitted. Suggestions please. This is cheap and cheerful, Edited April 22, 2022 by NobbyHall Link to comment Share on other sites More sharing options...
Tracy D'arth Posted April 22, 2022 Report Share Posted April 22, 2022 Hire a scabbler and take the lot off to steel. 1 Link to comment Share on other sites More sharing options...
bizzard Posted April 22, 2022 Report Share Posted April 22, 2022 (edited) Flap discs on an angle grinder will also make short work of it. Aldi do good ones Edited April 22, 2022 by bizzard Link to comment Share on other sites More sharing options...
mrsmelly Posted April 22, 2022 Report Share Posted April 22, 2022 2 hours ago, Tracy D'arth said: Hire a scabbler and take the lot off to steel. Yep, absolutely right. Seconded. Link to comment Share on other sites More sharing options...
ditchcrawler Posted April 22, 2022 Report Share Posted April 22, 2022 6 hours ago, Tracy D'arth said: Hire a scabbler and take the lot off to steel. May not be too convenient where he is situated, but it would also get my vote Link to comment Share on other sites More sharing options...
Opener Posted April 22, 2022 Report Share Posted April 22, 2022 Many moons ago I took back rust patches and applied a red oxide (can't recall source) - ran out half way along so stopped off at a convenient DIY store and bought enough to finish the job. Finished off with a couple of coats of bobbly paint from a well known manuf. Over the next couple of seasons large patches of the latter half just 'fell off' - literally! The front remained largely intact. Square one - cleaned back patches and keyed the whole roof. Exterior metal paint from a DIY store. Two coats rollered on. Still looking immaculate a good year on. Top tip: start at the front and work backwards - never look behind you - too depressing. Just stop painting when you fall off the back of the roof 🙄. Link to comment Share on other sites More sharing options...
Greg & Jax Posted April 24, 2022 Report Share Posted April 24, 2022 (edited) Hi Biggles . Its quite a job doing the roof . I done our wide beam a couple of years ago , rust under the paint ! Bought a scabbler from Germany £150 ish and took 15 years of paint and antislip right back to bare steel amazing bit of kit , two coats of vactan 3 coats of primer two topcoat with anti slip mixed in and a final top coat on that . I found the flap discs type stuff quite heavy going with not a lot of progress. And my grinder gave up the ghost.. Good luck with the project . My neighbour bought the scabbler to do his roof so I even got half the cost back , I like to think he also passed it on aswell . Edited April 24, 2022 by Greg & Jax Added Link to comment Share on other sites More sharing options...
Biggles Posted April 24, 2022 Author Report Share Posted April 24, 2022 1 hour ago, Greg & Jax said: Hi Biggles . Its quite a job doing the roof . I done our wide beam a couple of years ago , rust under the paint ! Bought a scabbler from Germany £150 ish and took 15 years of paint and antislip right back to bare steel amazing bit of kit , two coats of vactan 3 coats of primer two topcoat with anti slip mixed in and a final top coat on that . I found the flap discs type stuff quite heavy going with not a lot of progress. And my grinder gave up the ghost.. Good luck with the project . My neighbour bought the scabbler to do his roof so I even got half the cost back , I like to think he also passed it on aswell . Do you have any links to the scabbler.? Was it air or mains? Link to comment Share on other sites More sharing options...
Hartlebury lad Posted April 24, 2022 Report Share Posted April 24, 2022 I did mine this weekend. When i bought the boat 9 years ago it had had a nice roof paint job, with a couple of glossy colours and a non slip finish in parts. 3 years ago, it was struggling . I put a delta sander on the rusty bits (started probably by knocks off hardwear etc,) treated the spots and put 2 coats of Bondaprimer on them. I then proceeded to put 2 further coats of Bondaprimer on the whole roof. Its belt and braces, but not hideous, and lasted 3 years until needing doing again. In fairness, you can take a bit of pride from the appearance of your boat, but few notice the roof in passing. Keep it simple i feel ..... Link to comment Share on other sites More sharing options...
LadyG Posted April 24, 2022 Report Share Posted April 24, 2022 7 minutes ago, Hartlebury lad said: I did mine this weekend. When i bought the boat 9 years ago it had had a nice roof paint job, with a couple of glossy colours and a non slip finish in parts. 3 years ago, it was struggling . I put a delta sander on the rusty bits (started probably by knocks off hardwear etc,) treated the spots and put 2 coats of Bondaprimer on them. I then proceeded to put 2 further coats of Bondaprimer on the whole roof. Its belt and braces, but not hideous, and lasted 3 years until needing doing again. In fairness, you can take a bit of pride from the appearance of your boat, but few notice the roof in passing. Keep it simple i feel ..... I hope I never have to take back the roof to bare metal, it's a huge job, so I keep on top of it, I hope, but I would say it is quite evident, it's white grey, very pale, would show any rust. Link to comment Share on other sites More sharing options...
Hartlebury lad Posted April 24, 2022 Report Share Posted April 24, 2022 1 minute ago, LadyG said: I hope I never have to take back the roof to bare metal, it's a huge job, so I keep on top of it, I hope, but I would say it is quite evident, it's white grey, very pale, would show any rust. I think if you catch the knocks and spots early, back to metal on those, and keep recoating all the rest every few years ? .Oddly, the roof doesnt bother me nowhere near as much as the higher profile sides.. At least you get to see the results of your hard work whilst steering! Link to comment Share on other sites More sharing options...
Greg & Jax Posted April 25, 2022 Report Share Posted April 25, 2022 It was a mains scabbler . Ebay £169 still on there . Link to comment Share on other sites More sharing options...
Biggles Posted April 25, 2022 Author Report Share Posted April 25, 2022 39 minutes ago, Greg & Jax said: It was a mains scabbler . Ebay £169 still on there . Is it this? https://www.ebay.co.uk/itm/Roberts-R12550-Concrete-Grinder-Unused-/134044675918?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0 Link to comment Share on other sites More sharing options...
Greg & Jax Posted April 25, 2022 Report Share Posted April 25, 2022 (edited) https://www.ebay.co.uk/itm/372485192524?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=zT-uGXJ5QTm&sssrc=2349624&ssuid=OQadPeFiTAy&var=&widget_ver=artemis&media=COPY Thats the one I bought . Edited April 25, 2022 by Greg & Jax 1 Link to comment Share on other sites More sharing options...
Higgs Posted April 25, 2022 Report Share Posted April 25, 2022 1 hour ago, Greg & Jax said: https://www.ebay.co.uk/itm/372485192524?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=zT-uGXJ5QTm&sssrc=2349624&ssuid=OQadPeFiTAy&var=&widget_ver=artemis&media=COPY Thats the one I bought . And I think any tool that can be attached to a vacuum, if a vacuum is used, is a bonus. Link to comment Share on other sites More sharing options...
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