I am just finishing up with a GPR kit and have used Birchwood Casey Plumb Brown. As in the past I had good results with it, however, the problem always is to get it to stop rusting. I generally let the parts sit for a couple of days to brown nicely then oil the daylights out of them. In 2-3 days the oil is gone and there is a powdery rust on the parts. Oil again and in a few days the same. I've had this go on for weeks and in one case months before it quit rusting.
Has anyone else had this problem? If so whats the cure?
Has anyone else had this problem? If so whats the cure?