We use Jay Cooke's primer. You should be able to get the high build primer from your HDU supplier. We put on 1 coat, lightly sand, then another coat, then the finish color. Bear in mind that in the HDU, it's made up of millions of cells, so yes, it will absorb quite an amount! Be sure to use high build primer, it's pretty thick stuff! Good luck! Oh yea, it depends on the weight you get too, the 15# is coarser than say the 18 or 20#.
------------------ Mike & Arene Berry Concord Sign Company 60 West Street Concord, New Hampshire 03301
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I also use Jay Cooke's primer. One coat and its ready for medium tack sandblast resist. If you want an ultra smooth letter, they recommend 2 more coats of primer sanding between coats, then lettering enamel.
------------------ Dave Sherby "Sandman" SherWood Sign & Graphic Design Crystal Falls, MI 49920 906-875-6201 ICQ: 21604027 sherwood@up.net
Posts: 5397 | From: Crystal Falls, MI USA | Registered: Apr 1999
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