I have recently started using potassium permanganate for staining antlers. Although I have been very pleased with the results so far, I was curious if any of you have ever used potassium permanganate over a set of antlers that have been painted white? I believe the intent was to fill in the cracks of the elk antler because they are very weathered. My thought was to sand down the antler before using the PP but like I said I'm not too experienced with the product and I am unsure if the PP can absorb into the antler with it already being painted. Any feedback would be awesome.