I have had similar requests for unusual finishing over the
years.  I have found a poly primer available from Eastwood products
www.eastwoodco.com  The primer is Featherfill item #19781.  This primer
has good filling properties on wood and sands well.  I would then use
a base coat, clear coat color match from Duro coat available from
a auto paint supply near you.

Good luck
D Dusenbury