I used VHT wrinkle plus on mine. This stuff was really hard for me to get perfect because humidity and temperature play a huge roll in outcome.

Heater control panel turned out great the first time but it took three times to get it right on the radio bezel. One spot about the size of a quarter would not wrinkle so I ended up putting some spray can clear primer before wrinkle and then it took.

Yes you have to wet sand smooth with 400 grit. Then spray 2 medium coats and let cure naturally not using a heat gun. Takes about two hours depending on temperature to cure and wrinkle up.

Option: use primer mentioned above under wrinkle.