Paint Drying Boxes

I've been using 2 100 watt (frosted) bulbs, but my box is fairly small. Doesn't hurt to go all out though! at that point you can use an old toaster oven to bake them

When I was painting metal boilers, I'd let them sit for a while in a covered shoe box, with no heat source. Then I'd put them in a warm oven (lowest setting) for an hour or so.

My paint oven is a cardboard box lined with aluminum foil and heated with a 125-150 watt heat lamp in a reflector socket that clamps onto whatever is handy. I don't know what kind of temperature it gets to, but you do NOT want to touch the painted object when it's hot. I usually bake it for a couple of hours, sometimes more if I forget it's there. I'd guess it's north of 200 degrees, maybe closer to 300. That's the temperature of the workpiece, which absorbs energy directly from the heat lamp, not the temperature of the foil or the box. 

find an old oven, the built in type, just hang a 100watt bulb inside, maybe an oven thermometer, too.  if it gets too hot just leave the door open a crack.

Thanks everyone

Now Dad wants me to look into an old convection oven

When painting metal or cast items, I use an old electric household stove oven. I Pre-heat to 225 degrees, open the door and use the slide out grates to place my painted items on. ( naturally I use my own "COLLECTOR COLOR" paint). Let the heat flow over for about 20 minutes. The very top grate is great to hang the small parts on with small sections of 'bailing or mechanics' wire for hangars. NEVER close the door when drying, only to get temperature up 1st time around. I spray and dry in the garage, so no vent is required for the drying.   Harry

 I have saved an old toaster oven for a future try,and as mentioned I have tried putting tinplate in a electric full size oven with good results.

 But the project I've neglected lately has been my aluminum insulated industrial pizza warmer that I'm modifying with halogen lights.