I've never had any auto parts powder coated locally and only own some hand tools and items around the house that were powder coated. Even with careful use, never wet and stored out of the sun everything has faded and looks terrible. Maybe this is just cheap powder coating for cheap items. Is automotive powder coating any better after 3-4-5 years outside?
There are cheap powdercoats that fade fast, and there is good UV stable powders available that don't. Be sure you know whats being used for your application.
Stay away from the epoxy based powders for outdoor exposure. It might work for a frame but if it's exposed to sunlight, it degrades rapidly. The primary cause of powder coat failure is preparation. Items need to be clean and fingerprint free just like for a quality paint. If you're used to wiping down a part with paint thinner and shooting Rustoleum over it, your powder coat will fail.
There are many good and bad techniques for powder coating but beginners usually fail in the preparation and application areas. Temperature control is also critical.
Many items "around the house" may not be powder coated at all. It could be a vinyl or rubber dip. Both will degrade with exposure to nothing but air.
good powder coat, paint thinner wont touch. you have to burn it off. been on my Indian frame 20 years & 70,000 miles looks as good as day one. charley
People have already said it in so many words. I'll try to put it into a single list.
Powder coat is just another way to apply paint. As with liquid paint, there are good painters and poor painters, good paints and poor paints, and paints best suited for each application.
The different powder paints have different strong points. Some are cheap, some are forgiving of less than perfect surface prep, some are really shiny, some are very chip resistant, and some provide excellent corrosion resistance. Few materials provide all the necessary characteristics in a single coating.
There are good preparation techniques and bad preparation techniques. You need to find someone who can guide you through the relative merits of different types of powder, and who knows how to use them.
If you want a good job, it will not be cheap. Your coater needs to have several choices of material for you to choose from. For the automobile application, this typically means a first coat of a corrosion resisting primer. Then a subsequent coat of a UV resistant topcoat.
Inexpensive powder coating usually comes from a One-Size-Fits-All shop. One color coat, chosen for low material cost and easy application. That's the best for the powder coating guy, but it's not best for you.
I have had engine pans,oil pans,intake manifolds and rear housing and bake drums coated in the last few years and it's still really shinny an cleans up great. I use a well know powder coated in Chattanooga,Tn area. He does great work. Auto Cycle powder coating. He does all Coker tires special order wheels that they sell and ship to you coated. Tim
The best and highest quality of power coat product is made by Cardinal, the largest manufacturer. There is always a reason why one company is less expensive than the other, preparation , and quality of the powder coat materials.