Steve We Gone is correct as usual on the throttle body issue with the bubbling paint. Bypass it. I tried Jerry's paint and while he sells quality parts, he cautions on matching just right. I tried painting with Jerry's paint, the throttle body (after sanding) and air dam without much of a match. You would really have to paint the whole engine rather than a part of it. That would look good.
So I ended up painting with a good matching Duplicolor Red Engine paint the air dam. throttle body and the plenum strip. May end up painting the plenum letters also. I don't generally like going off OEM but this made sense. McGuire's Color Restorer X is a great color. polish to restore the tarnished grey.
I get a lot of compliments as this Duplicolor paint matches well with the ZR1 red and spark plug wires. Cheap bling for the LT5!