As Jimmy BufFETT said quoting JangoUri, a little bit goes a LONG way. I barely put any on my finger, and I try to spread it over the biggest area I can, don't let it clump on the object, or you'll have to sand and start over. When I RnB, I use: prime, wetsand, prime, wetsand, then RnB, then wetsand, then RnB.