I'm a wax girl. Wax always seems to work best for me and I'm ok with reapplying every 6 months or so. With that said, I cleaned them really good krud cutter. It's a great degreaser. Then sanded them first with 120 grit, then 180 grit, and finally 220 grit. Then cleaned them again with the vinegar/water mixture. I always have a spray bottle with the mix handy. Once dried, I primed and painted followed by waxing.
Once you’ve worked out which types of hardware are comfortable to use, it’ll be time to start thinking about shapes in relation to the shape of your cabinetry. In general, knob and pull styles should be matched to kitchen cabinet styles. What this means is if you have selected a plain cabinet style, for example, shaker or flat, ultra-modern doors, then you’ll want square, plain hardware to match — perhaps something like Emtek’s brass bar knob or a similar style. Recessed panel doors or doors with curving and intricate trim will often do well with more ornate hardware styles.
Let’s talk first about metals. As a general rule, I like to keep the different metals in a kitchen to no more than two. If you have stainless steel appliances, that counts as one metal. So that leaves one other metal you can bring into a kitchen. If you’ve got brass light fixtures, that’s your one other metal. Your new hardware should be nickel or brass.