After my gross "chrome" trim became oxidized and disgusting I decided to change it
First off this is very time consuming. No other way to put it, it involves HEAVY masking of the car, of course only if you are worried about overspray.
Total Time: 2-3 Hours of Prep + 2-3 Hours of painting/touchup + Drying
Total cost was about $35
-Primer, look for adhesion to plastic/aluminum
-Krylon Glossy black paint (aerosol)
-800-1000 Grit Sandpaper
-Dupli-Color Acrylic Enamel (for clearcoat)
-Automotive Masking/Painters tape (mine was green)
-Razor blade (cutting paint away from tape)
Start off by taking your green/blue painters tape and carefully taping around the edge of the trim.
The tape should go deep behind/under it so no part of the car is shown. Take extra time for the lower sill trim on the doors.
Try to use one (1) piece of tape when masking the lower part ie: where the car door meets the trim. It is easier to mask the top part of the door (where the trim meets the door glass) because of more space.
I masked with my windows up and doors open
Once car has tape around every inch of the trim it is time to seal off the rest of the car. On one side I thought I was cleaver and used newspaper, how wrong I was. The smallest gaps left black overspray (wet enough to get off) on the car! I think the best thing to use is painters plastic sheeting. Mine was a HUGE roll that i could easily cover the entire car with.
Use a plastic bag around the mirror
Seal off the doors and especially the cabin (because we are leaving the doors open while painting)
When the car is all sealed/masked you are now ready to begin the sanding/priming.
First clean the trim with 409/alcohol/degreaser/windex etc...
Then let the cleaning solution dry, then vigorously shake the primer can for 1 minute and do a few test sprays to make sure we have no "spatter"
Then go over the trim in a fluid motion without stopping the spray. Repeat for 2-3 coats.
Give the primer no more than 10 minuets to dry
Now we can start painting
Get out your black paint of choice and shake that can
Then go over the trim in a fluid motion without stopping the spray. Give each coat 5-10 min's to set, repeat for 3-5 coats or whatever suits your fancy. Be VERY careful to not get excited and spray too long in a certain area as you will have drip and be royally screwed. (as I was...)
Now while the paint is drying
This step is purely for those who want a really glossy look. (like true shadowline)
Once the paint is semi-dry shake the can of clear coat and then go over the trim in a fluid motion without stopping the spray. Repeat for 2-3 coats.
Once again be careful of drip!
Let it dry! Best bet would be to run a fan on low if doing this at night, or roll the car out for some sunshine. Make sure to leave the doors open while you dry, this is for sure an overnight + well into next day drying event.
If you do not let it properly dry when you close the door the paint will "mar" or screw it up.
Now while the trim is drying it is time to remove the tape. DO NOT wait too long, for sure wait until it is dry to the touch. We just want the paint still malleable for us to peel the tape off without the paint coming with it!
This is a very time induced process if you want it right. Just go slow and you will be fine! On parts you are iffy about, such as the lower sill trim on the doors, use the razorblade to cut the paint way from the tape.
I hope this was easy to follow and I hope you enjoy your new Shadowline trim!