[ERA Chas]

Patrick-I would not steer you wrong. Lacquer thinner applied by paper towel will immediately dull the powder coat. The wetter, the deeper the incursion. Removes brake dust completely. But it will not remove powder completely or easily. That fresh surface is your base for color-it becomes like primer and very clean.
I know this because I had every, bracket, all suspension parts including half-shafts, springs, uprights and the bar and jack hooks done in powder. I forget the actual parts count but take every fastener out of the complete suspension plus all the brackets every where and spread those parts on the floor. That's how many. I kept those coated parts immaculate over the years by toweling with WD-40 and wiping dry.
I learned the care and feeding of powder coat over 2 decades that way.
Trying to save you all that monkey-motion the 'smart money' recommends. You're not doing a $20K custom paint on a raw body. I did that too-in 1990.