Jeff if it is warmer outside it seems to work better also. When I leave it in the basement in the cool months it does not work as well. I just bring it upstairs in the winter to strip paint. If the part was glued to paint or chrome and not scraped it will weaken the joint also. I striped a chrome engine my brother built as a kid, it fell apart took off the chrome and I found out it was clear plastic under the chrome.