A friend of mine recently turned me on to this product from CRC. This has more consistency than Boshield, and appears to offer more long term protection as well. It also is not as cumbersome as RPM. Then you could just leave them bare as originally assembled.

https://www.amazon.com/CRC-Corrosion...0013IZSCS?th=1

I was so impressed with it, I bought a 5 gallon pail