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Thanks, I have some experience spraying, prep work is 9/10th's of the work when painting anything. Painting is the easy part; more concerned if anyone had first hand problems below the water line with adhesion, blisters or such. This is a 1972 13'. N amount of buffing will bring this gel back. Not in horrible shape as far as cracking on the hull. When I do the topside I have much much much prep work to do. The boat was in a back yard for years with no cover.