First, just so we're all on the same page, stainless steel is an alloy, not a coating so it is not possible to refinish your Glock slide with stainless. Now, a plating that looks similar to stainless is a different story. Our NP3 is similar in appearance to stainless steel, a shade or two darker but similar.
We do all the preparation work, disassembly and reassembly. Just take the slide off the frame and send it in, we can plate it with NP3 for $120.00. The address, etc., is on our website: www.robarguns.com