I use the same technique as Sir Crashalot. It works well. Once I finish the whole model, I carefully wipe it down with acetone. This makes the Monokote sparkle. Then I give it a coat of Turtle Wax.

When I clean up after a day of flying, I wipe the model down with a soft DRY rag, and I DO NOT use any cleaner. The car wax lets me get away with this, and it only takes a minute our two to wipe it down.

About every three weeks I clean the plane again with acetone and re-wax it. (This is a good time to give the plane a good A&E workover too).