Never tried one myself, neither have I tried a convential oven, Mom
would have killed me. I did try my wifes food dehydrator though until
she caught me LOL.
I'd be somewhat cautious depending on the type of paint you are using.
Enamel paints emit flammable fumes (at a lesser extent than spraying)
while drying. Don't know for sure if it would cause a problem.
What I've always done since I was a kid...
I used a spare 2-1/2 gallon fish tank with a loose fitting piece of glass for a lid.
Put a 75 watt light bulb in one of those clamp-on silver funnel looking
deals, and mounted it under the tank (a couple of inches away so the
heat wouldn't crack the glass).
It helped speed up the drying time alot and kept the heat source away from the paint fumes.
My Dad would always joke with me when he came into my room - "Nice
color fish, what is it?" "Oh Dad, you should know... it's a '57 Nomad
fish!"