Dash Cap

I would use a lower pad ( after cleaning ) for color sample, and yes the same paint designed for vinyl and plastic would be used on OEM pads and the aftermarket cap. One issue is the base color. Aftermarket caps are black. The one I bought 20+ years ago was a oily odd formula plastic almost like the unbreakable combs. It will need a very good prep wipe to ensure paint bonding. Now I don't know how the green pigment compares to my metallic red but... black might not change to dark green easily. How to make it all cover match proper regardless? Light neutral base. Invest in off the shelf spray bomb of light neutral base color, ( like that piece shown above is what I use, sand beige ) or very light gray works, for basecoat on all pieces.