Just had a quick look at the blobs and they have almost disappeared on their own. I kinda though they might, because I'm using a 75% thinners, 25% paint ratio and layering it on until I get it to shine. I'm rather impressed with the guns I bought off eBay. I was thinking they might be crap and I would only be able to use them on the tail gate hinges. But once I played with the settings on the touch up gun, I can say it's as good as my Star suction gun.