[Arran]

The replacement grilles look like they have a texture to the finish, and the seller even states this, so you would have to paint or polish the grille to make it more original. Interestingly enough he also has a dial escutcheon for a mid 1930s Silvertone set I have, again it would have to be polished or painted, I was going to make one out of either a chunk of plastic or hardwood at some point but this may be a better way. Some of these grilles had a marbled or mottled effect in the plastic which these 3D printed ones do not have, though apparently you can get plastic filament that does, I saw a guy selling ornaments at a craft fair that were multi coloured, and or pearlescent.
Regards
Arran