Heater Box Finish - Interior

[Hans L]

Getting ready to restore the heater box (the interior component with the heater core).  What is the correct finish?  It appears to be textured and flat, much like the top of the dash (PPG Code 9317). 





Recommendations?

Thanks!

[tmodel66]

I used the 30% black on mine. Same as the firewall. Now the box in the engine bay gets full gloss.

[rsr]

The inside part is very much like the top of the dash .....flat almost a gray tint.