I live in fairly dry Northern California, but we do sometimes have humid-ish days. I have seen posts from our friends in the Deep South that humidity can make painting essentially impossible. Is there a temperature and humidity range where spraying dope and lacquer paints is optimal, and a range where it is not prudent to even try?

It's been awhile since I had a problem with blushing. I was probably using hardware store lacquer thinner, which is a bit of a risky business. But cheap. My recollection is that I solved the problem by turning on an electric space heater to warm up the shop...and then turning it off. I'd never use a propane or any other combustion type heater, since all produce moisture as a by-product.

The heat relates to the dew point, but was a gut feeling solution for me. I had to Google up a definition of "dew point", because it's been 50+ years since I took any science classes. Below is the definition I found, in case somebody would benefit.  Steve


"The dew point of a system is the temperature where the amount of vapor inside a system becomes the saturated vapor. In other words, for a closed system, the dew point is the temperature at which the dew starts to form. At the dew point, the relative humidity becomes 100%. Any temperature above the dew point will have relative humidity lower than 100%, and any point below the dew point will have relative humidity of 100%. The dew point is a temperature and, therefore, it is measured in temperature units."