Hi. We are carrying out a partial refit of our narrowboat. At present the shell is lined with varnished and veneered 3-ply and we intend to paint the interior an off-white so that it doesn't feel like the 1970's. We're pretty new to this, although not stupid! So far we have sanded and then wood-fillered any holes and rough parts, and then re-sanded. Any areas that are a little worse for wear around windows we have sanded a bit more aggressively, covered with a wood-rot treatment, wood fillered if necessary, and then finally roughened up a bit with sandpaper so that the undercoat/primer can take hold. We have used a damp proof white emulsion undercoat (Wickes own brand), and then plan to cover that with a silk or matte finish top coat. Does this sound like a decent course of action? I'm presuming the top coat should not be water-based? Can anyone suggest a good paint type to choose from that's available in somewhere like Wickes or B&Q? We have only completed one room so far, and then it occurred to me that maybe we could have gone with a one-coat (combined primer & topcoat) wood paint, thus saving time, and possibly money. The boat (65ft 1998 narrowboat) is not damp, but a damp-proof undercoat/primer seemed like a good idea to us at the time. Any thoughts would be much appreciated!!