Re: How much GelCoat??
Andrew,
What size boat and which style?
For a 20, I would guess 2-3 gallons for the hull (from the chine up and the whole transom). My 23 deck cap will take about 1.5 to 2 gallons. Yes, you can mix in the colorant to achieve what ever you want. It can be a bit of a pain in the a$$, because you have to over estimate how much you're going to use.
You will probably want to buy a no-wax gel coat, and add the surfacing agent for your last coat.
If you are really going to do it, I recommend buying the gel coat in a large tub. It is sold by the pound in large quantities. A 45 lb bucket is somewhere between 4-5 gallons.
If you are planning on a dark color (i.e. flag blue) you will need neutral gel coat and then add the liquid dispersion colorant. White gel coat can yield pastel and lighter colors.
I’m in the middle of this myself; I’ve had some problems with orange peel too deep in the coverage. Most likely my fault as it was a very hot and humid day that I made the spray. Long story short, I will most likely do a base coat, then sand out, and then come back with a duratec mix for the top coat. I will know more this week when I get back home and start sanding some new work I did last week. I'm not far from you if you want to come over to see what is going on.
Jim
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