[VA72C10]

I agree it can happen...I've seen a firewall be shaved and oil can even though the same guy shaved my markers and it didn't do anything at all...he simply welded in the patches with a mig and I ground down the welds and it was good for final skim and paint. So sometimes it can oil can and others it won't. As mentioned...tack and wait....tack and wait. Have something else you can work on at the same time....put a couple tacks in and then work on the other area then come back to it when its' cooled down.