If you want to go 100% original, when you are searching for a plating source try and find one who will plate with dull rather than bright nickel over the copper and before the chrome as that what was done originally. Following the nickel, only the raised perimeter and leading edges of the grille teeth should be polished as original. You will then have one of the few re-plated grilles around that actually looks like an original in all respects.
If you cannot find a plating source who does dull nickel, you can replicate the original dullness on the sides of the grille teeth and behind the raised perimeter with course Scotchbrite.
As a final touch of originality, paint the area between the hood lacing and the raised perimeter flat black to eliminate the see-through condition that exists at the front edge of the hood top and side panels. That step is often overlooked by restorers of '33 and '34 grilles.