Matte Pearlescent respray glitch.

1: Respray your car to a matte colour

2: Go onto metallic, look through the colours. Just keep hovering over the metallic colours for at least 10 seconds

3: Quickly back out of the metallic section and put your crew emblem on, and then off.

4: Now you can access the pearlescent section with your matte colour on.

Edit: Look at the comments if your not in a crew. There are other methods.