In Reply to: Paint Hardener posted by JR in AR on February 10, 2020 at 12:46:09:
Does the hardener make the finish more durable, or does it just dry faster?
This depends on the type of paint and hardner you are using. In general it makes the paint harder. Drying time is controlled by the use of a reducer.
After you add the hardener, does it cut down on how long your unused paint lasts in a sealed container?
Do not add hardner to the full can of paint. You mix spray batches in a mixing cup and put the mix in your sprayer. Pot life of the mixed paint and hardner is relatively short - matter of an hour or less depending on the paint and temperature. Discard any unsprayed mix and thoroughly clean the spray gun as soon as you finish spraying.