Hey Bo,
Thanks for the question. To answer your question, yes the attraction of powder to a base layer is certainly achievable. There are to reasons why multiple coats of powder cause a problem for hobbyists and DIY'rs.
First, and most important, you must have a good ground. If you sprayed your first coat and then try to spray a second or multiple coats you must have a spot on the piece to be coated where the metal is bare and still making a good ground. Sometimes I need to use a file to clean up powder where the hook will hang before I spray the next coat.
Secondly the Powder Spray Gun that is being used plays a huge part in being able to apply multiple coats. With most hobby guns you can not adjust your amperage and or KV which is necessary in spraying multiple coats effectively. This also holds true for "Faraday Area's".
Hope this helps. Let me know if i can help you out with tricks or tips so you can get those multiple coats down.
Quote:
Originally Posted by bpu699
In the spirit of keeping this thread alive 
I have always been curious. When one powdercoats, whats the best way to get a "thick" coating? I know that the initla layer is due to electrostatic cling. But, does that attraction of powder to metal continue once the initial layer goes down?
I do some rare powdercoating at home, and it seems once you put a thin layer down, the powder is no longer really attracted to the part. And thin podercoating seems to scratch pretty easily.
Also, how the heck do you get powder into the small nooks and crevices? Due to the Faraday effect, the powder just doesn't seem to go there...
Bo |