Editing Phosphoric acid as metal pretreatment (section)
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==Published positions from primer and paint manufacturers== ===House of Kolor=== *[http://www.houseofkolor.com/PDF/TechData/English/KP21.pdf House of Kolor Kwikure Epoxy Primer Surfacer tech sheet]: <blockquote> ''"'''NOTE:''' Do not use any acid base products such as self etching primer, etc. under the KP2CF primer. This will almost certainly cause an adhesion problem.'' <br> '''''NOTE:''' If you find it necessary to use a metal conditioner to remove rust, etc., be sure to thoroughly clean and neutralize the treated area following the conditioner manufacturers recommendations, then using our KC20 post sanding cleaner with a maroon scuff pad to insure all acid residue has been removed before priming. If not, this will almost certainly cause an adhesion problem."'' </blockquote> House of Kolor is a division of Valspar Corporation. ===Southern Polyurethanes, Inc.=== *[http://www.southernpolyurethanes.com/tech%20sheets%20new/epOXY%202006.pdf Southern Polyurethanes epoxy primer tech sheet]: <blockquote> ''"NEVER use SPI Epoxy over a Soda Blasted vehicle, Acid Etch/Wash Primer, Rust Converter or other Metal Treatments. NEVER!"'' </blockquote> The owner of Southern Polyurethanes, while confirming that he doesn't promote the use of phosphoric acid, has detailed some options that '''should''' solve the phosphoric acid film problem, in [http://www.hotrodders.com/forum/ospho-factory-response-173513.html#post1235021 this post on the Hotrodders Bulletin Board].
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