Well I can tell you what not to do! I'm just getting back into C/L after a 35 year layoff and am building a new Ringmaster and rebuilding a 35 year old 'master. I was ready to finish but had no dope so I got clever and used polyurathane. Went on nice but then the dope I ordered (Reynolds from Aircraft Spruce) came and I thought; "hey, add some color!". I can tell you for sure that pulling masking tape (3M blue) pulls dope right off of polyurathane.
Keep all hints and suggestions coming, I'm reading them and they will help me regain my lost finishing skills; I nee all your help!
PS: I posted this before with a picture, but I got an error message because the picture was to big, I resized, reposted and then it gave me another error saying I had already posted (couldn't find it) , then I reposted just the picture, and it came up, but no verbage, so here's this. Maybe I'll learn out to use this forum sooner or later. Sorry if I'm causing confusion.
Brian