Lots of people are asking about how to fill gouges and other things in the hulls. This is what I use. Mix, fill, cure, smooth off with wood rasp. As one can see, I am not needing a "show ski", and so I do not need to gelcoat or color match. Actually the MarineTex White is a good match already for the SeaDoo white on my 2019 ski. I think it works best if you let the Marine ex sit for while in the pot, so as to harden up just a bit and get more stiff. Although the box says it does not sag, I find that it does sag just a little bit, and that letting it stiffen a bit in the pot can help with that.