I've got about 400 rounds through my P3AT and have some visible wear on the top of the barrel (top of chamber) and on the top of the slide. Is there anything I should be putting on it to clean it up? Oh, and it's a parkerized finish.
You can buy a Burchwood Casey flat black touch-up pen but it wont be an exact match. By design, all Kel-Tec pistol barrels drag on the underside of the slide creating scratches on the portion of the barrel exposed through the breach. I have only one Parkerized Kel-Tec (P-32) and choose not to own another due to barrel appearance. Always keep a good coat of oil on a Parkerized pistol for the best results.