treeman,
I like acetone better than alcohol for degreasing. If you think the problem is oil, you might try applying the solution with 0000 steel wool( degrease the steel wool with acetone first). If you card with a wire wheel that has been used for something else, degrease it with acetone also. None of that may work but worth a try. BTW be sure you have even coverage with the solution.
Mike

Last edited by Der Ami; 03/22/19 10:37 AM.