Re: Repair a LARGE hole ???
In the past when doing LARGE repairs ,the best method we found to support your intial lay up (without any old pieces for reference) is to use very thin plexiglas,from any hardware store,grind back or cut out any frayed edges,on the inside you can use claw glass to bond the sheet.Cut the sheet to extend about 2in.around all edges,use a commercial heat gun to heat the plexi to confrom to all your contours,this can be done in one or more pieces,once you have the piece(s) shaped to fit,apply masking tape to the outward facing surfaces of the plexi,use claw glass to attach to the inside,mix the claw glass for and MEDIUM cure,use a bakers decorating funnel(the thing they use to decorate cakes) filled with the mix and only apply where needed to hold the forms,this can be secured with masking or duct tape until hardened it should only take 5 or 10 mins. to set up,being sure the fit is very tight.once it sets you have your backing to start laying up on the outside.With a rough lay up done out side,go back inside and remove the plexi which will release because you did 'nt let the resin get to hard and it won't stick to the masking tape and proceed to glass the inside,this will give you an even repair inside,be sure to roll the matting thorouhly with a glass roller to get the air "OUT" and the resin IN ,once you have the inside DONE,then go to the outside and do the same till its all even,then all you have left is the gel cote work,this is a MAJOR undertaking and takes alot of time and experience to do right and pass inspection ,they ARE or should be going to ask for pictures and do a density test over the repair,so be sure you have the right amount of mils of glass,did ALOT of these for ALOT of insrance claims and 3' by 5' isn't really big at all,just REALLY expensive,do you know how to spray and blend gel??
