Humidity and dew point

Digger1 · Post by **Digger1** » Mon Jun 13, 2005 4:52 pm

Does the dew point affect spray paint the same as humidity does?

Right now in Augusta, the dew point is at 86Âº and the relative humidity is 65% which is just under the upper limit for optimal spray painting conditions.

The higher the dew point, the more uncomfortable it is outside, all sticky and makes your skin all clamy.

Post by **TER-OR** » Mon Jun 13, 2005 10:14 pm

A good moisture trap is your freind.

Water through the compressor will have a different dew point, as it is compresed and heated.

But humidity is humidity - more water in the air...

Digger1 · Post by **Digger1** » Mon Jun 13, 2005 10:25 pm

Spray paint...rattle can.

Can't afford (or figure out) an airbrush right now.

Post by **TER-OR** » Wed Jun 15, 2005 7:33 am

Ah. You'll have to pick your days wisely. Painting above the dew point will mean less condensation. Or, if you have a garage you might get away with painting early in the morning while it's still cool but dry in the garage.

scanam2005 · Post by **scanam2005** » Sat Jun 25, 2005 10:04 am

The dew point definitely affects the performance of spray cans. On hot humid days, I avoid spraying as much as possible and wait for drier weather. If parts really need to sprayed I will do it indoors where it is air conditioned. I will open the windows for a few minutes after spraying to let out some of the fumes. The parts, however, are drying in the airconditioned room where the humidity is reasonable.