Re: 1990 Bayliner Decal and Pinstripe Removal from hull.......
If they are vinyl stripes and decals, I found that a nice fresh single-edge razor blade worked great, with Windex or Dawn+water in a spray bottle for lube. I was able to get them started with the blade, then pull on the loose end while 'helping' with the soap and blade and pulled off long strips. Don't use a lot of pressure on the blade, and hold it at a very low angle to the hull to avoid scratches.
If they are lacquer decals (so thin you can't feel an edge), or to get the small pieces more easily, you can look on Google for "decal eraser" wheels that will fit a drill.