Exit, thanks for the headsup on the hardener.

I got the spec sheet and it states:

"INSTRUCTIONS FOR USE:
Add full contents of this package to 1 gallon of oil-based enamel... Mix well initially and occasionally for the next 30 minutes to fully activate. Begin using after the 30 minute activation period has passed. Shelf life is 8 hours after which mixture should be discarded."

Their tech group says that it does not effect the durability of the paint, and they could not say how long the drying time would be reduced.

I wonder how the self-leveling characteristics of the Rustoleum Professional mixture would be affected. Has anyone ever used the Valspar Hardener (18-4625)?