I usually keep some cans of carb cleaner around as I normally lightly oil my molds with a q-tip. For a mold I haven't used in awhile gets the spray carb cleaner treatment. Some fellow casters I know will take a new mold and put it in a small sauce pan and leave it there until the water comes to a boil then take it out and wipe it dry. Then start casting. the wrinkles are a sign that the lube used in the manufacture of the mold is actually in the pores of the metal. Hope this helps. Frank
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