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Originally Posted by Feral Cement 
Q2 - Better to add coats of epoxy when tacky, or let cure, light sand, recoat? |
Always better wet on uncured but don't stress if it doesn't happen. But if cured, you MUST remove "blush" (if present) and you MUST sand before next coat. The way to tell if it is cured or not is simple. If it clogs sandpaper, it is uncured. If it can be sanded, it is cured. Another way - if it is soft enough to dent with a fingernail, it is uncured.
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Originally Posted by Feral Cement Q4 - Will a solvent "thinner" in the epoxy help it penetrate and bond with the wood more reliably? |
No, unless the epoxy that you are using recommends it. West Sytem has a good info about this on their website or, at least they use to.
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Originally Posted by Feral Cement Q5 - Brush or roller? Foam roller for smoothest finish? |
If you are talking epoxy here, it doesn't matter as you will sanding it and overcoating. I always just use a disposable brush.