I just did one. DON'T screw around with sanding it. Get a gallon of acetone and a box of rags. Pour the acetone directly onto the paint, just a fairly small section, and wipe the paint off with the rag. I did an 80" fuselage with one gallon in about an hour, I did it outside, and took a bunch of flights on my OV10 Bronco to break up the monotony of the job inbetween. And get some rubber gloves. Sanding is DEFINITELY the long way around. Don't know about fiberglass strippers, but I worry about those chemicals both to my own health and to the health of the glass...