I have a picture of the exhaust side of the piston which shows it cloudy. This is what I could get with my flash, but it shows a uniform surface with no marks or streaks of any kind.The piston and bore are perfect. These are wonderful tools and I treat them with the care and respect they deserve. This saw runs great and I decided to do my first u tube to show it in operation. The bar is an 18 inch rollomatic E with full chisel chain, sharp and ready to cut. Thanks for looking at my listing. I think this is the correct link. Looks like my link is not working. My digital savvy son explained to me how to use the link I posted above. If any of you are in my camp, this may help. Once the address is in, then clicking enter on my keyboard brings up the video. I apologize for the more digital savvy out there, but posting this for those in my advanced age group to hopefully help any who are interested in seeing my saw run. The item "STIHL 046 MAGNUM PROFESSIONAL CHAINSAW" is in sale since Monday, February 17, 2020. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Chainsaws". The seller is "provider48" and is located in Wyalusing, Pennsylvania. This item can be shipped to United States.