Hi All
So.. I had the bottom blasted and I have lots of these little black marks now. I believe they were the start of little blisters that popped during the blasting.
(http://sailtomcat.com/wp-content/uploads/2017/02/27-Hull.jpg)
I am not sure what to do about them. My thought was to putty them over with the epoxy bottom putty, then, since I am applying 3 coats of barrier and them the ablative bottom paint coats after that, that this would be enough. These have sat open all winter and now into spring so any acid in them should be gone. they are small (pinky nail or smaller), but lots all over the hull.
There are no larger blister (or spots) nothing greater than a pinky nail.
I contemplated a full none thickened epoxy coat but would like to avoid if possible.
Then full is in very good shape except for these.
Just looking for advise as I am working on getting ready to start the bottom work this weekend finally.
Thanks in advance for your advise.
Tom
Would seal with Clear Penetrating Epoxy Sealer (CPES) Then fill and fair with thickened epoxy, Then a minimum of two coats of epoxy barrier paint and then bottom paint.
Did my CP-19 last spring after drying out over winter.
TG
The proper formula is FOUR coats Interlux 2000E then two or more coats of your favorite ablative paint.
I'd paint those with raw wet resin (mix up a quart), polyester or epoxy no real difference, thicken up the rest with fairing filler and fill them. Sand smooth then go after it with line 1.
What Tim said. My favorite material after building a boat with it is Silver Tip by System 3. It is the best penetrating resin and the Quick Fair product is delightful to use. I would avoid using any polyester material for repairs. Polyester is about one third the cost of epoxy so that is what OEM builders use. But when you want to protect from blisters, you use epoxy based products. If your entire hull was epoxy based you would not have to barrier coat. And no matter how well you do it, you will get some breaks in the barrier coat leading to blisters. So why bother to repair with polyester when your particular relatively small repairs will only cost a few bucks more to make them blister proof.