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Mike,
We all live and learn. The big trick is to survive the errors. Half a millimeter is nothing to worry about. Unless the hull is vacuum processed (highly unlikely unless it is a high buck or a one design), it was sprayed into the mold with a chop gun. The hull thickness variation is probably already three or more mm. You never did indicate how large and area you were rebuilding. Now you mention vertical elements. Thwartships (accross the boat) parts are either frames or bulkheads - Stringers are fore-aft structures. Were these frames original and you are replacing them? Or were they your own addition to shore up the damaged area? Either case....Sail the boat. If they are original structure that you replaced. Then they are the real structure of the boat and the glass that you just patched is only there to keep the water out. If they are something you added, then the hull is probably a whole lot stronger than it came out of the box - even with 1/2 mm of laminate missing locally. In this case, I think it makes little difference, but if you said more about the boat (manufacturer, version) and the actual area and possible cause of damage. It might make a concise answer more possible. You can use the gelcoat over a wet coat of vinylester resin. Polyester doesn't actually stick to much, but the base of vinylester will do as good a job of anything at making it work. You can post pictures at: http://www.web-a-photo.com/ http://community.webshots.com/ Both have free and suscription packages, look them over. If I missed anything - try again. I'm here a lot. Fair Wind and Smooth Sea Matt Colie Lifelong Waterman, Licensed Mariner and Pathological Sailor Bonasa wrote: Bryan and Matt, Thank you both very much for taking the time to help this newbie. I already had to grind out and redo one of the patches cuz I wasn't happy with the layup, I'd rather not do it again. I've complicated things (I know, by now you're slapping your forehead, don't blame ya) by glassing in vertical stringers across the patch so I need to look and see if I can avoid the stringers. I think first I'm going to try the easier way and grind down from the outside. I only need to come down about a 1/2mm at the center of the patch, the sides recessed. If I'm not satisfied with the integrity of the repair, then I'll suck it up, break out the grinder, and do it again. If anyone else has any input I'd love to hear it, I'm a student here. Well, at least I'm learning alot... By the way if anyone knows of a free web site I'll post pictures of the damage and repairs, maybe it will benefit others. Thanks again, Mike Now I'm not sure what to do. My first impulse is to sand (scuff) the fiberglass down past the hull and lay on gelcoat, then sand the gelcoat flush with the hull. Would this work or am I just ruining the patch job? I'd rather not use paint so any suggestions that would allow me to use gelcoat (I've already got it) would be appreciated. Thank you in advance for any help! Mike |
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