I was made aware of the yellowing factor before starting to use it. Hence, I paint of the area on which I have used it with w&w white till it's opaque. I then brush/draw my scales in and blend colors as needed. I haven't seen any yellow on the ones that I painted back over top. However, I'd be open to suggestions on a product that does the same thing, as fast and as strong. It's not so much a fin attachment for me (the glue does that) as it is a blending media where the fin meets the body (I don't use much and don't feather it out very far). Using magic sculpt/ apoxie sclupt, I find it takes longer and after having "whited out" the fin magic, I have just as much time into painting that area to match as I would with epoxy putties.