I ALWAYS handle my cars with white cotton gloves for one, I pick these up at the local Wally World in the medical supply area, that saves me a lot of time by not getting finger prints on them, I also use a super soft makeup/blush brush to dust my models, less chance small parts come up missing lol. Since my models are all in display cases I don't have to clean them too often, maybe once every couple of years. When they do need a little polishing I use Turtle Wax Ice since it's clear and leaves no white residue in cracks and crevices. The Turtle Wax Ice works exceptionally well on my Carney Cases also. These have worked for me very well over the years.