Ok, So you want to change the color of your interior, or want to match a new part with your original. Whatever the case may be, I'll show you something you may want to know. I got this dash yesterday. It's maroon, and my interior is black. We'll fix that.

you'll want to scuff the surface. *dont use sandpaper* You will ruin the texture of your panel. I use a s.o.s wire pad whenever I do anything like this. A box of them can be had for under 3 bucks.. so its worth it. just gently scuff the
entire thing.
Before:

After:

I think the best results are seen after about 3 coats. I put 8 on mine today.
The result:

I will take better pictures tomorrow and update the thread.