Acrylic sink

[Marty]

Have a kitchen with what is like an undermount sink, or molded into the countertop Has hairline cracks on bottom Does not leak. I want to first try to paint it with the correct product Any suggestions?

 

[Meadowlark]

I think I would try to fill those cracks first with a product like Milliput Porcelain & Fiberglass Epoxy Putty.

If you don't think the cracks are enough to worry about Rust-Oleum Tub and Tile bonds extremely well to acrylic, creates a hard glossy finish, and covers a large area.