Does anyone know if Draino-type products will harm finishes like brushed nickel? I usually use a product like this once a month - or when the tub drain seems slow. My new tub will have brushed nickel so what will I be able to use to keep the drain moving freely?

Thanks.

Ps. Yes, I have heard all the arguments against getting fancy finishes but I really, really, like the brushed nickel.....