Originally Posted by
REDMASTA
It’s painted metal and your bolting something up against it with a good amount of force, you can’t expect it to stay pristine. If it bothers you that much get a an aluminum frame with steel inserts, or a steel frame with the paint removed from the dropout area, or remove said paint along the dropout as I suggested, OR install the wheel and never ever change your cog and make sure to always install wheel in same spot so missing paint is hidden under the nut.
I use those felt rings they sell at auto parts stores for use on battery terminals.
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A race bike in any era is a highly personal choice that at its "best" balances the requirements of fit, weight, handling, durability and cost tempered by the willingness to toss it and oneself down the pavement at considerable speed. ~Bandera