Since my brother paints hot rods, and does a lot of painting on aluminum and some brass, I asked him for what product he uses for primer.
He uses only Dupont Etch Primer number A-4115S, it comes in both spray cans and gallon cans. Like he said, he can't afford come back due to paint chipping, so this product is used. First the item is cleaned then a light coast of the above etch is put on. After that another light coat of a GOOD primer is put on then the colour coat. He says that you should not cover over the Etch Primer with a colour coat, it must have a light coat of another primer, per ferably the same type as the colour coat will be.
The bad news is, at least in Canada, this is for industrial supply only. The paint wholesaler will not sale it to anyone other than a Shop that has need of it. Also the spay can runs around $20.00 Canadian per can.
Not really sure what the laws are like in the US if you can buy items marked Industrail Supply Only, or not. But this is one Etch Primer that works, as long as its applied correctly and the colour coat is applied correctly.
Since I am nearing time to paint an aluminum base wanted to check to see what worked and what didn't. Just wanted to share what some shops use since they really should know what works for them.
JimN
He uses only Dupont Etch Primer number A-4115S, it comes in both spray cans and gallon cans. Like he said, he can't afford come back due to paint chipping, so this product is used. First the item is cleaned then a light coast of the above etch is put on. After that another light coat of a GOOD primer is put on then the colour coat. He says that you should not cover over the Etch Primer with a colour coat, it must have a light coat of another primer, per ferably the same type as the colour coat will be.
The bad news is, at least in Canada, this is for industrial supply only. The paint wholesaler will not sale it to anyone other than a Shop that has need of it. Also the spay can runs around $20.00 Canadian per can.
Not really sure what the laws are like in the US if you can buy items marked Industrail Supply Only, or not. But this is one Etch Primer that works, as long as its applied correctly and the colour coat is applied correctly.
Since I am nearing time to paint an aluminum base wanted to check to see what worked and what didn't. Just wanted to share what some shops use since they really should know what works for them.
JimN
