If dealing with painting new products, the powDer coating company will prep the metal to their specs.
In the example above, it probably cost less because the dish had all old paint & corrosion sanded off.
Did they give an additional acid bath to prep?
'
A properly applied powDer coating should easily last 20 years without peeling.
?(colors are available, plus gloss, satin, and matte finish).
There are a few dishes in the field now, which continue to look new.
I can't prove they are powDer coated, but it is my strong suspicion:
?The two in my signature, plus the Winegard Pinacle 10 foot perf.