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Got a question for anyone with experience using testors dullcote. Says use at room temp (70%) with low humidity. Deosn't say a top range though. Is 88% to hot? should I wait tell its cooler?

It has been my experience that the humidity is a bigger factor than the temperature. However, once the mercury starts climbing above 95 degrees you could have a problem of the sealant drying before it hits the model.

ya its a dry heat were I live.

Test it on sprue or something similar.

Then you shouldn't have any problems. You could spray your figures in the morning or late in the evening whenever the humidity is the lowest.

As mentioned, humidity has a greater impact on spraying (whether varnish or paint) than temperature. Also, keep in mind that the temperature of the contents of the can matters far more than that of the area in which you spray (e.g. a properly warmed can will work just fine, even if you spray outside in freezing weather).

That said, if you're dealing with particularly hot and dry weather, you may run into issues. In those cases, spraying closer to the model than normal is usually best, as it gives the ambient conditions less of a chance to mess with the atomized particles before they hit the model. Just remember that since you're closer, you'll need to move faster to avoid overloading the surface and causing pools and runs. Spraying early or late as whill4 suggests, of course, may circumvent the entire issue.

Honestly, I've found Dullcote to be pretty forgiving (at least far more so than any of the acrylic sprays I've tried), so you may not have any problems, at all. I've sprayed it in every temperature from the 20s to the 90s (Fahrenheit) and it's yet to frost or "clump" on me. Best not to take unnecessary risks, though, so spray some scrap to test things out before you commit and break out finished models.