Powder Coating Question, Is primer necessary? Options

[AndrewBlyholder]

Was thinking of having some trailing arms powder coated. Got two estimates from local shops. Cheaper one claimed that they didn't need to put a primer coat on before the finish coat as it wasn't necessary, the finish coat adheres well enough by itself. More expensive shop claimed that an epoxy or polyurethane primer was absolutely necessary. Any advice from the past experience out there?

Thanks,

Andrew B.

[Engman]

We ecoat and have powdercoated a lot of parts at work. We have an e coat system and sub out the powdercoat.

The most important step in any paint operation is to clean the parts. Powder or primer does not adhere well to parts that are not clean. As memtioned above any rust is a bad thing.

You can do with or without primer. If primer is used you need to check that it will be compatible with the powder coat.

Chipping is an issue with powder coating. Powder does chip if struck with the right force and angle. I really do not think chipping on the trailing arms is a huge issue unless you are on a lot of dirt roads.

YMMV

M