Paper towels are the worst thing to wipe down an area prior to painting. Always use a tack cloth. These are saturated with a type of resin---not wax. Do not press too hard, though---you could transfer some of the resin to the model. Use fresh tack cloths purchased at an automotive paint and supply store. The fresh ones are more pliable and work better.
Never use newspaper to mask a model off. This, too, will not only contribute to the dust nib problem but can ruin a paint job due to how thin the paper is as well as the potential holes in the newspaper allowing overspray through. Use automotive masking paper---it is dust free and solvent resistant.
When hosing down the floor prior to painting, let the water flow gently from the hose with the hose on the floor. No splashing!!! Do not spray using a nozzle or you will stir up dust as some have found. Sweeping the floor down the night before is best. Even in the best of paint booths you can still get a few dust nibs. Just wet sand with 2000 and buff.
I once had a moth get into my paint area. This little guy decided to do a little dance all over the model, leaving that "wing dust" all over it!!! He finally got stuck to the wing. When I pulled him off his body came away OK but all of his legs were buried in the paint. The model buffed out really well, though. Kevin