Relative Humidity and spraying

[MKlee]

What is the consensus for the ideal RH during spraying? I'm going to be using Behlen's rattle cans and I'm not sure what I'm looking for in terms of RH. Also, how long does this humidity need to be consistently maintained?

In other words, if I spray 5 coats over 5 hours with 45% RH and it rains later in the evening and the RH jumps up to 65%, is that a problem?

I've recently moved to Africa and am ready to resume finishing my second build but we're heading into the "rainy" season with very high temps. No central HVAC makes controlling the environment very difficult. I'm just wondering what weather forecast I'm needing to feel comfortable spraying.

Thanks,
Mark

[tippie53]

That shouldn't be too much of an issue. It may still take 3 4 weeks for the lacquer to cure out.

[B. Howard]

humidity generally only has a real effect during the initial drying of the lacquer. high humidity while spraying can cause problems like blush, but once the coating has flashed off it should not be much of a problem. it may slow down the"curing"process a bit but that's about it.