The first task in the flat fender mold making process this morning was to take the yesterday's molds apart. In this first photo, I'm starting to remove the masking paper, I posted this photo to show how I made the mold with the flat fender clamped to a factory metal side fender.
Once the tape/paper is off and the clamps are removed, the mold just falls off the factory metal fender. The metal fender is not harmed. The white part is the mold master fender and the orange part is the new mold. I am not going to take the mold master fender out of the mold at this point.
In this photo (of the other side mold this time) I've removed the rest of the tape near the fender mounting flange. What I'll do next is prep the mounting flange and the visible part of the orange mold with wax and mold release, and I'll lay up fiberglass against that surface. The mold release will prevent the new work from sticking, and when it's cured I'll end up with a two part mold - the first part that I made last night (and haven't removed from the master fender yet) and a flange part, which will bolt up to the first part to make a complete mold. Fenders will be molded with the two parts of the mold bolted together; when it's time to remove the cured fender from the mold the flange part of the mold will be unbolted and removed, and the fender will slip out of the main part of the mold.