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You can use a heat gun, but the air may blow dust up and it tends to blow the finish off the scales, tried it once.

If the bubbles are just on the surface, sand away. If they are deep you have to sand back to wood and start over or put them in the giveaway pile and start over.

I use the cheep stiff bristled brushes from the dollar store, haven’t had a problem. The bristles are stiff, too stiff to use for a final coat. The ‘painting on’ of the epoxy is to make sure you have...

Make sure your work surface is perfectly flat. I spent two days leveling my dowel rods which are glued to a large hunk of high density partial board. Those dowels all have to be the exact same length...