When it comes to painting... its all about PREP WORK! Bad prep = bad finish... every time.
Once the priming is done and your happy with the smoothness of the part (which should be pretty close to glass) You need to make sure you spray all the stock plastic with the SEM Sand Free or Plastic Adhesion Promoter. I've tested it both ways, and both do the job equally well for me. Spray a layer on and wait for about 5-10 minutes for it to being to dry up (or flash), then spray it again. (The directions on the can will give you rough times for drying, however if you spray in the sun, on a reasonably warm day (above 60`) you'll find the UV from the sun dries the part much faster) Once this is done get ready to spray the texture coat. If you've never used this product or never seen it used, grab a piece of cardboard and spray that a few times, to get a feel for it. The distance from the nozzle to the part being painted makes a huge difference in terms of the size of the texture. For the Wrangler texture you should spray from roughly 2-2.5 feet away. This is not exactly the same as the stock pattern, but its about as close as your going to get.
ok... Now that you've practiced a little bit, lets spray the part with the texture coat. Remember light coats letting the texture build up. You've practiced so you know what I mean. Remember to softly blend it in with the factory texture. Apply the texture coat twice. Once you have done that let it dry. It should only take a few minutes. While its drying grab the Scotchbrite pad. Once the texture is dry you'll use it to very gently knock it back down... its a good idea to practice this too.
Once your happy with the texture and the blending job... its time to paint.
Remember light coats...
Then test fit the panel...
Once you have completed the build you should let it rest and cure at least a day (24hrs)
During the installation after you have wired up all the switches and you install the switch panel into the frame for the final time apply a small amount of glue to the frame to make sure the switch plate frame stays in place. You don't want it coming loose while your crawling around... so glue it in.