Tinting polyester

I’m thinking about have some colored polyester resin to do the glass of my boards.

Anyone knows how can I tint the polyester resin?

Buy some at hardware or art supply stores, mix in with resin for lam coat?

I saw some aussie surfboards that had the glass colored, but it had the resin tinted with some kind of paint or pigment. I asked about it in local hardware shops and nobody knows haow to do it…

I just want to tint the polyester resin and tehn galss the board.




Thank you !!!