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Hi I have always used epoxy high build primer,then wet sand and polish but it will not polish to that high of a luster.I have also used Duratec but it still doesn't polish to the place I want to be. Seeing epoxy mould surfaces cannot be polished well I have tried a different technic with my mockup surface because I want a really high luster part. I still use the epoxy primer but then shoot it with black base coat and then 2 part clearcoat. I wet sand this and then more clear coat. The reason for the black base coat is so I can see if I break through when wet sanding, it is also easier to see what you are doing on the surface when wet sanding. I then go through to 1200 paper and then #1 #2 #3 3M polishes. The surface is now like a show car and has a very hard surface. Now I apply my release system and make my mould. Hope this helps. Fred
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