|
Dave_Id is correct in the fact you can use e-prime as a sealer. Depending on the color of the top coats you may have to add a tint to the e-prime in order to get a good even color in the final paint. You should add about 10-15% more reducer to the primer as it is mixed to help the e-prime stay wet long enough to get a coat of paint on top of it. If you want to, and have no concerns about primer color bleed through, you can use a sealer designed just for the purpose of sealing the primer. The advantage of a sealer is that sealers take longer to dry and this gives you more working time to get the first coat of paint on the metal. If the primer is tinted to an acceptable color, you can use a mid coat adhesion promoter rather than a sealer. These adhesion promoters actually glue the paint to the primer and there is less chance of peel off in a few years down the road. I use adhesion promoters on tractors simply because the castings are hard to sand to get a good textured surface for the paint to stick to. Keep in mind that the original purpose of a sealer was to burry the old layers of paint under something that they would not react with. Top coats (paints) have reducers, activators and other additives that can attack the under layers and cause them to turn loose fom the base metal. We call it "lifting". If you hear a body man say "the paint lifted" you will know he is talking about the new paint acting like a paint remover and loosening the bottom layers of paint and primer to the point where it comes off. When the underlayment comes off, the paint comes off too. Then you get to start all over. E-prime by itself is a good sealer as it is not affected by the even the "hotest" top coats. In fact on good straight metal after I have given it a good cleaning, sanding and priming, I mix up my paint in one gun and my e-prime in the other. I spray the e-prime, put down the primer gun and pick up the paint gun and spray the paint before the e-prime can dry. This saves a lot of time, steps and materials. (read that a meaning MONEY).
|
