Someone with more experience than me might want to chime in on this. You said that you purchased a oiled compressor. I'm not sure, but might need a filter to prevent oil from getting in your paint.
The chassis looks great as do the cuts to the wheel wells. You get more out of those Sportsmen kits than anybody. How many '55/'57 Chevy bodies do have?
Ed, you did a great job on this build. I have a few of these kits and I would be very pleased if any of mine turn out nearly as good yours. Keep up the good work.