STEEL WHICH HAS BEEN SAND BLASTED RUSTS VERY RAPIDLY. TO PREVENT CORROSION, BLAST PRIMERS ARE APPLIED QUICKLY WITHIN 15 MINUTES AFTER THE BLASTING IS COMPLETE....
WASH PRIMERS DRY RAPIDLY TO A MATT FINISH WHICH IS AN IDEAL SURFACE FOR THE SUBSEQUENT COAT OF A PAINT. ETCHING OF THE SURFACE BY THE PHOSPHORIC ACID RENDERS BETTER ADHESION TO THE FILMS....