That happened to me when I got my first two sleds and it's never happened again. It should stop doing that after you give it a good run. But yeah I still have some oil spots that show a little on the purple blow-molded ski. I can only say that the stains won't completely come off just from running around in the snow. If you find a cleaner that works and doesn't stain or bleach the ski even worse, please post it.
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