fiberglass blisters

[Hydra Sport]

Does any body know what to do with fiberglass blisters. A couple that have delaminated and cracked open. The are 2 and 3 inches each. What product works best ?

[Steve Bakken]

You can sometimes get a small jar of gelcoat paste from your dealer. This is mixed with fiberglass hardener and applied. Then it is sanded and buffed. It will not look perfect, but it will be better than what you've got now. The main problem with this is that the color is only "close" and you'll see the difference when you're done. On nearly every boat that we repair, when we order gelcoat, even from the original manufacturer, we still have to tint it to get it to match.