I had the exact same experience Steve, I'll tag you into the build thread so you can see. Spent a huge amount of time and a considerable amount of money on the build, and although in my case I did use the proper etch primer (which stuck fine) the Valspar enamel I used was the problem. It was not at all fuel resistant (bubbled and fell off when the fuel vent leaked) and chipped very easily (like when the starter handle hits the recoil on retracting). The sad thing is being a powerful ported 92cc saw, I'm not trusting putting the main bearings back in it after beating on them to remove the crank, even though they have only done an hour or two of work, and believe me Stihl like charging for their (plastic cage) main bearings! Have to do the seals and gaskets too...