Hi Craig,
I’ve ‘Canadian Pacificized’ a number of a number of Kato FP7’s and given up on painting the grills to look better than “silver painted plastic grills”. I paint mine black and add Plano Models etched stainless grills - purchase E unit or F7B grills and cut them down to the correct length as the F7a grills are too short. Incidentally, I also really like to add freestanding wire handrails, appropriately painted…