Help with gelcoat

[cliff150]

Hi can any one tell me i can do with this gelcoat .The boat being dry for 10 years what do i need to do ? I think its Hull Pox

Many thanks cliff

[Hyperacme]

Osmotic Blisters
http://forum.cgoamn.com/index.php?topic=7651.0

[Plugcheck]

Looks more like simple abrasion.  I would suggest a good cleaning, hotsey, soap and water, but no silicone or wax.  Osmotic blisters are just that, blisters.  When dry you might see a hairline crack is all.  Sand with 80 grit, smooth with a filler/surfacer, epoxy fairing is best, but waterproof filler works.  Sand smooth then top coat.  That could be paint, gel, epoxy, all depends on what you plan to do with the boat.  Hope this helps

[dorelse]

Looks more like simple abrasion.  I would suggest a good cleaning, hotsey, soap and water, but no silicone or wax.  Osmotic blisters are just that, blisters.  When dry you might see a hairline crack is all.  Sand with 80 grit, smooth with a filler/surfacer, epoxy fairing is best, but waterproof filler works.  Sand smooth then top coat.  That could be paint, gel, epoxy, all depends on what you plan to do with the boat.  Hope this helps

Dunno Mike, I see a lot of blisters on that hull picture.

[Hyperacme]

" Dunno Mike, I see a lot of blisters on that hull picture. "

Yep .. Click on his first picture and blow it up ..
Picture I posted was just a small section of his large picture.

[Plugcheck]

Hard to tell what's dirt and what's not.  Didn't he say it's been out of water for a long time?  The water dries out and blisters go back to flat.  If you press on them with a pointed tool, awl, screwdriver, they will break and the void will be exposed.