I've made several two piece plaster molds from varies objects I needed to copy. Haven't had any problems until now!
I've got an object which is part of a plastic (fiberglass acutally) auto body panel. Its called a "dog leg molding." Funny name, I know. Its curved in several directions and has numerous grooves and ridges. I lost the one on the passenger or right side of the car. No one has a replacement. I've checked junk yards, car dealers, etc.
I can easily remove the remaining panel (its about 3 inches wide and 12 inches long) and make a two part plaster cast from the panel. The problem is I need to make a piece the exact opposite from the one I'm casting. In other words all the curves, grooves, and ridges must be a negative of the original positive so that it will fit on the left side of the car instead of the right side.
I've never done anything like this before and I'm confused! In effect, I have to create a negative mold from the dog leg panel. I think I have to start by making a conventional plaster mold and then somehow create a second negative mold from the original positive mold.
If anyone has ever done anything like this before I would appreciate a reply.
Thanks guys!
Holophote