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post #9 of Old 03-19-2009
Join Date: Feb 2009
Location: NY Metro
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T37 Chef, nice. I am doing the same thing right now on a 1983 Mason. After soda blasting - which uncovers all defects/impacts/etc - I too noticed what I call irregularities in the gelcoat. Bumps in places that held no water (visually or with the moisture meter ) and their counterpart the crater. The craters are only the gelcoat. I sanded the entire bottom, am now filling with MAS FLAG epoxy / micro baloon mix. The number of the little 'imperfections' are likely more than 10,000. I am also doing a rudder repair and repairing and fairing the substantial area on the underside of the keel. When she is sanded again to fair ( all excess faring mix off ) I will barrier coat with the same epoxy, unthickened of course. I will tint the epoxy grey and let it to a full cure, slap some paint on and then, of course, sail it. I chose to barrier coat with MAS for the following; have used in the past with great results for other projects, VOC free, blush free, excellent customer service when I called with loads of questions, cost effective, you can vary pot life/ mix and match resin hardeners, and there is no 'window' to paint with antifouling. Just let it cure fully and then paint when you want.
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