Sanding Between Layers?

I’m glassing my 6’10" this weekend with three layers of 4oz. on the deck, and two on the bottom. Herb wisely instructed me to add the third layer of 4oz. after the first two layers had hardened. Question: Do I sand the the first two layers before adding the next layer of glass, or do I just sand the whole thing when the third layer has hardened? Thanks, SWF

I’m glassing my 6’10" this weekend with three layers of 4oz. on the > deck, and two on the bottom. Herb wisely instructed me to add the third > layer of 4oz. after the first two layers had hardened. Question: Do I sand > the the first two layers before adding the next layer of glass, or do I > just sand the whole thing when the third layer has hardened? Thanks, SWF Nope, you don’t have to sand it (if epoxy you have to) just ad the next layer, after glassing you use sanding resin, then sand and hot coat. Peter Rijk.