i had the intake runners on my engine powder coated a few months ago. the guy that did it called the color “near chrome” but i’m not sure what brand he used to do it with. while working on my engine, i rested my arms across the runners and also got some water spots on them. i didn’t wash them immediately, but now they are just black spots/stains that won’t come off. i only tried soapy water to clean them with. i emailed the guy who did the work and he said he’d redo them but i’d have to pay. but in reading this forum it seems to me like this spotting may be the result of improper application. does anybody think this is the case?