Has anyone applied a sealer to their cabinet hardware prior to installation? I love the style offered by Tradition Hardware-- they are solid brass but the polished nickle is not PVD.

While the Baldwin cup pulls are lovely and will last forever, they don't have any of the other knobs or pulls that I like and Emtek's polished nickel might be PVD but the samples we received felt somewhat lightweight and had rough seams/edges compared to the Baldwin or Tradition Hardware.

Does anyone know if hardware tarnish (or cleaning said tarnish off) will stain my cream cabinets?