i had mine powder coated on my gti and it went all pitted after about 600 miles as said was mint when done
and my series 2 was a chrome 1 from as autos got it blasted and as said had the baffle removed as ive heard of the shot wrecking engines
it was etch primed 2k primed 2k paint and laquer and has been spot on and has a better finish than the powder coated 1
the powder coated 1 cost 40 all in
the painted 1 has cost 25 thats inc blasting too the charge cooler is powder coated though