Is it ever ok to laminate over gel coat or is it absolutely necessary to grind all the way thru to some cloth material?
I decided to remove the slight hook in the bottom of this Eliminator while I was epoxying in the front of the intake after moving it back in the hull 5-1/2". In an effort to minimize the amount of material to fill in the deression I ground all the way thru to glass in some areas but in other areas not quite all the way thru as you can see in these pics. All surfaces to receive new cloth were ground with 36 grit with a d.a. sander and cleaned with acetone mutiple times prior to laminating to insure a clean dust free surface. You can see in these pics. how thin the remaining gel is. The color gel coat is backed up with black in the mold before laminating the hull. That's the thin black area you see between the white gel and the graish cloth material of the hull. My concerne here is adhesion. If this is a bad method and likely to delaminate some time in the future I would rather grind it all off now and start over rather than having to fix it some time later. I used richold isothalic resin, 2-oz. csm and 1708 biaxial cloth for the build up. I laid the largest pieces first and then staggered back with smaller pcs. as I built up the surface to fill in the low area and minimize grinding to get to the desired surface height. All material laid was larger than necessary so I could grind to a feather edge . and have a nice flat finish surface. Will I be ok with this or do I have to start over?