Inside heater box paint
 

what the best match to paint the non ac inside heater box something in a spray can

https://semproducts.com/product/texture-coating/coating

We are talking about the portion of the heater box that resides in the passenger compt.
I used a Kylon Aerosol can version over some semigloss black that a previous restore applied and it looks fine. Very close match to my unrestored heater box The above shoud work. I hope we are talking the same component and location.

Jim