Protecting the dropouts

So,

I've finally found a NOS vintage frame in my size at a good price.

It's beautiful, and the paintwork is perfect.

I want to fit a flip flop hub, which will mean removal of the wheel every once in a while.

A lot of track dropouts have a non-paint finish around where the bolt bites so as not to get the dropout ugly looking. Is there anything I can do to cover my forward facing horizontals and prevent the paint chipping off and subsequent rust?

I just don't want to wreck the paintwork when I finally build this up.

Michael

A nylon washer.