I do it when I'm impatient or when I need to be absolutely sure the paint is dry. I use a diffuser for a nice even dry. I've not heard of any disadvantage to using a hair dryer.

I am traveling Australia in a caravan, so no luxury of that much power draw.

So I use a small, battery powered fan. It cranks. Super fast. And dries stuff quickly.

I like it has no heat, so warping is reduced. I've grown to love it.