I've never used Gorilla glue but it sounds like a pain in the arse.
Normal poly you just apply (thinly, evenly) and let the glue dry - do not touch it while wet. Then peel off the little bit of dried foamy squeeze-out with a chisel/whatever.
Normal poly you just apply (thinly, evenly) and let the glue dry - do not touch it while wet. Then peel off the little bit of dried foamy squeeze-out with a chisel/whatever.