Where's the gelcoat you are trying to match? Is it on an are that has been faded out over the years?
I used gelcoat from Minicraft on the hull of my old '85 Grady. It matched almost perfectly there. But on the topsides where the offwhite gelcoat had faded, I had to mix it myself. White base w/ a touch of brown coloring agent. In my case, I learned that it had to be mixed to look a little too dark for it to come out right once applied.
Same thing on my current '93 Grady. All topside gelcoat has to be mixed. I redid this hatch earlier this year...
