Best Way to Heat a Garage, Need to paint my bro's car... Options

[Coomer]

I'm hoping to paint my brother's '88 Celica over winter break, but the problem is that my garage that I'd paint the car in is very cold. It's not insulated and is composed of concrete walls and a concrete floor with a wooden framed roof. For the most part, the garage is enclosed, although the garage door doesn't seal completely near the top. And the garage is a two-car garage, shown below.



Basically, I'm trying to find a good, efficient way to heat the garage for a day so that I can spray the car. It needs to be fairly inexpensive too, because I'm broke.

Anyone have any ideas?

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[Coomer]

That's what my dad suggested, but it seems kind of dangerous, since there'd be an open flame and paint vapors throughout the entire garage. But there is already a chimney in the garage(top right corner of that pic.) So Installing a wood stove wouldn't be too hard. It just seems kind of dangerous to me.

Edit: It's going to be painted John Deere Blitz Black, which is a satin black made for industrial use on tractors. It'll be my first time painting a car, so I figure it's a good color to learn with since it's flattish-properties will hide my mistakes that I'm bound to make.