No sorcery here
Dont mean hi jack the thread
Since you asked, here is how I used this "primer" in the pink-insulation foam plug construction.
Pink insulation is glued together, use Gorilla Glue. And then it is rough shaped with rasp, 50 grit sandpaper/ orbital to get the surfaces kind of on the same level, but still very rough.
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Then you can see the primer can I used Zinsser Fast Prime 2, I just pick a random sandable primer, nothing in particular. I use the entire quart, layed it on think. This was so I had a good base layer that I could sand on and build on top of.
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Then I sprayed a light coat of black spray paint on top so as I sanded the top layer (with long sanding block), the low spots would show black so I could easily find them and fill them with body filler. (I like using the Icing body filler because is sands much quicker than bondo) (this is the most time-consuming part)
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Then once most of the low spots are filled and the surface is pretty even I then apply the expensive stuff, Duratec Grey Primer. Spray in on thick a few coats and if desired you can sand it down to get a more level surface. The last layer of Duratec I spray on a fine mist and dont let it wet out, that way it gives the textured plastic molded look.
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At this point you can put on your mold release agent, gelcoat, fiberglass and polyester resin to make the mold.
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Once the mold is done, make your part, pull it out, trim it and throw it on the car, easy peasy.
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