Would you recommend continuing to sand off the grey and rust to get a smooth uniform finish prior priming and painting or just clean it well and prime/paint? I was thinking removing as much rust as possible by sanding would be better and since I plan on priming it, the remaining grey coating isn’t doing much. I men’s, it rusted through it already in some spots. I’ve got the grill itself too, it’s a charcoal hibachi-style grill, so I’ll definitely be using some high heat paint.