Join Date: Jul 2000
Thanked 236 Times in 223 Posts
Rep Power: 18
If polyprep, etc. doesnt work ....
I took paper kitchen towels, soaked them a straight ammonia, covered the towels with saran (to prevent drying) and let soak .. and that loosened most of it. For that which was left I did the same with acetone. Just about any 'floor wax' stripper (usually contains highly concentrated ammonia) will loosen this stuff.
..... and then I learned how to properly mechanically buff-out gelcoat with a high speed autobody shop polisher and knobby foam pads.