You posted about a vacuum pump elsewhere? Viscosity is important.
There are a couple good threads at boatdesign.net forums. More than a few trolls, too. But legit Naval Architect types hide there.
You can try a vinylester epoxy, too. I am a big fan. All the mechanical properties I can find say that the stuff I buy is better than a few big name epoxies. And it is compatible with chopped strand mat. Tuning the cure rate is a different beast, as is the smell.
And if you really want thin resin, you can play with adding styrene monomer. Or even more styrene and cobalt , but for that one, check to make sure you paid the insurance on the shop first.
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