I am looking to get into molding and casting parts for customs. An initial project I want to do is copy my Botcon Scrapiron head to make a couple variant clones for my Junkion army. I am curious if the creation of a mold will alter my original Scrapiron head in any way. I am aware that I should apply vaseline to help the mold release from the original. Will there be any problem in taking these steps? Also any general advice would be great.