Hi frosty,
you are talking about orange peel right??? Not about the paint actually peeling off???
for Orange peel, micromesh is the best way to go, however if you dont have that, or the money to buy it, you still have afew options...... one option would be to spray a few coats of FUTURE over the model, this works some of the time, it depends how bad it is.... if it's a heavy peel, i usually start off with 500 grit sand paper, working my way up to 1500 grit, wet sanding of course, but sand lighty so you dont go through the paint.......
Now if you want to strip the paint and start over, Castrol Super Clean (CSC)has worked the best for me. You can buy it at Wal-Mart for about 6 bucks for a gallon container.... If the paint is relativley new, it should only take an hour or two to remove the paint, however it may take a little longer.... It's also a good idea to get an old toothbrush, to help get the paint out of the recessed areas.......
If you use CSC, make sure you use a glass container with a lid, and keep the lid on it at all times, if you don't the CSC will weakin... You can use a plastic container, but you will never be able to use that container for anything else...
Hope this helps you out!!!