Yep! As long as the powder coat isn’t compromised, that shouldn’t be too much of an issue. Even though it’s very little, you would still have a tiny bit of galvanic corrosion between an aluminum drip diverter and the stainless steel fasteners in the presence of any juices (electrolytes), though. That’s why I slightly prefer the stainless steel.
Agreed.. The stainless screws on aluminum is the classic error people make on material selection. But, I would be ok with a mild steel drip diverter too.