You can use Mineral Spirits, Paint Thinner (same thing) or better yet
the oderless versions like I've been using for years. I get mine from
what ever store I'm near when I'm close to running out. The orderless
cost about a dollar or so more but it's worth it. So what, $3. and
change for a gallon of not so stinky paint thinner. Keeps Mama happy.
Just DON'T use lacquer thinner, especially with enamel paints or on
your bare plastic models. And please don't bring it in a house with any
source of flames, i.e. - pilot lights on stoves, hot water heaters,
clothes dryers, people smoking, cats or dogs playing with matches...
you get the idea... I hope. BOOM