RE: Refurbrishing an old airplane
Ameycam, I recently had to strip and recover a four year old ARF, and had the same problems you're having. The plane was covered in Ultracote in four different colors and and when the covering was removed, the colored residue stayed on the wood surfaces. I used a Scotchbrite pad dipped in automotive urethane reducer and the residue came right off. I also tried lacquer thinner and acetone but they dry too fast. Once all of the residue was removed, I sanded everything with 180 grit sandpaper followed by 320 grit and the wood looked good as new and was ready to recover. It's a messy job but it doesn't take long to do it. Would post before and after pics but can't get them uploaded. RS