I noticed earlier this week that I had what appeared to be tree sap on my rear quarter glass and fender. This is the same fender I whacked a pole at work with, seems to be a glutton for punishment. Anyways, I was at my mom's place today where all my detailing stuff is at so I busted out the trusty clay bar kit and went to town. It didn't do a damn thing to the stuff. Not one bit of it came off. Is it possible for tree sap to get really stuck into paint/glass after < 1 week's time? I'm thinking no, and it's probably something else. It doesn't have the look of overspray, and even if it was, I have no idea where it could have possibly come from. Even if it's tree sap or not, is there something else that might work even better than a clay bar kit to remove it?