Painting pearl mirror housing

[David Torrey]

Recently broke the plastic cover on the right rearview mirror (you don't
want to know how).  Located a replacement mirror in a salvage yard.  Both
the dealer and yard will only sell complete mirror assembly.   I found and
now have a pearl mirror.  My problem is that I need the color in regusa
green.  Can this pearl ABS plastic or whatever it is,  be painted without
some sort of preparation? Anyone have experience painting these without
having the paint chip off or not bond well?  Anyone have sources for small
quantity of paint?

Best Regards
David Torrey

'93 100CSQ Avant  149K miles
'88 Saab 900S  242K miles
'87 Saab 900S  233K miles
'79 BMW 320i   110K miles