Gel coat stain

[bomguthrie]

I live on the Gulf Coast of FL, St. Petersburg. I have a airdock boat lift for my boat -- it has air chambers that inflate.

6 months ago, I realized I wasn't getting a small portion of the keel out of the water and barnacles had grown. This section is about 6 feet long but only extends about 4 inches up the hull from the keel on boat sides.

So after some research, I did the following:
- scraped the barnies off
- sanded the area with fine wet and dry
- buffed the area
- applied a high-quality, expensive, wipe on was.

So I just hauled the boat again. No barnies, as I was careful not to leave any portion in the water...but where I did this work, there is a stain...very black.

I tired using a product called ON-OFF, it lightened it some, but did not remove.

There is no exposed fiberglass and I am told I removed the outer layer of the gel coat and the stain is in the gel coat, so I don't need to worry about damage to to the hull.

So....here is what I am thinking. I will apply the EasyPoxy paint to protect and cover up the stain. Any thoughts? I am also planning to use the primer. Here's the pic: https://dl.dropboxusercontent.com/u/71616959/Sundancer Keel - Stained.JPG

 

[jtybt15]

New gel-coat has a glazed skin. Once you sand it and break that glaze you get a porous surface. In fact, the rest of the gel-coat will be porous thru it's total thickness, except maybe some vacuum bagged gel-coat. Never heard of doing that to gel-coat, though.

I think you'd be better off painting the whole hull. Maybe even barrier coating and painting.

and that black stuff...is it mold or oil spill.

I also noticed you have square tubing in your trailer. My EZ-loader trailer had that and it rusted thru and dropped the boat.