How did you do the exhaust tips?
This is what I did, really helped out my process of painting the exhaust tips gloss black:
Supplies:
1. Brillo pads, the brand was 3M, any would work, approximately $3.
2. Rust-Oleum Flat Gray High Heat Spray Primer, approximately $10.
3. Dupli-Color DE1634 Low Gloss Black Engine Enamel with Ceramic, approximately $14.
4. Acetone, approximately $10
REMOVE THE EXHAUST:
1. There are 3 different locations that have rubber exhaust "hangers." Grab a bottle of WD40, and spray the male ends that are inserted into the rubber hanger. This will help lube up it up and able you to remove it with less effort as there is very little leverage underneath the vehicle. Get a pair of Locking Pliers, and yank them free. Take a look, there were typically two prongs inserted into the rubber exhaust hanger, one attached to the exhaust side, and one attached to the vehicle side. Remove the one that's attached to the exhaust and leave the one attached to the vehicle in place.
2. Use (I think it was 18 or 19mm) socket wrench, and remove the two bolts that are attached to the exhaust (toward the middle of the vehicle).
3. Pull the exhaust out.
4. Use your brillo pad and scour the chrome exhuast tips and whatever else you may want to paint. This will help the primer to absorb. Be sure to blow away any residue that is left behind. The prep work is the hardest part. Use the Brillo pads to clean all the exhaust buildup that is on the interior of the tips, and on the exterior, you want to "roughen" it up.
5. Use your Acetone on a clean microfiber cloth, and wipe away the interior and exterior of the tips (or whatever you want to paint) until its completely clean and the microfiber no longer gets dirty when wiping.
6. Spray with the Rust-Oleum Primer
7. Spray with the Dupli-Color Gloss Black
8. Be sure to wait for it to dry AND cure. I attempted to put my exhaust back together without it curing, and I scratched the hell out of it while installing.
INSTALLING THE EXHAUST:
It is just the reversal of removal. Be sure to give a quick spray of WD40 to the male end of the prongs on the exhaust, it will help out immensely when inserting into the rubber exhaust hanger grommets.
CURING THE PAINT:
I am no expert, but this helped me and so far I have no paint cracks/peeling/chips.
1. Run vehicle for 10 minutes, let vehicle rest for 10 minutes.
2. Run vehicle for 20 minutes, let it rest for 20 minutes.
3. Run vehicle for 30 minutes, lets it rest for 30 minutes.
You'll smell the paint cooking at first, sort of smells like burt spray paint, but it will eventually go away.
Hope this helps!