For some time, I've used an Evolution telescoping post on my M3L, to get the seat height I need. (I'm just outside the standard post's range, and the extended post is way too long. )

Unfortunately, the Evo's steel lower proved rust-prone on the outside. I suspect this was due to a combination of:
1) the sanding of the lower post's OD, that I had to do to make it fit my Brompton;
and
2) the damp/rainy weather that prevails on the Gulf Coast, where I do most of my riding.

To remedy this problem, I opted to give my M3L a Brompton Ti telescoping post for Christmas. (The fact that Brompton is discontinuing its Ti posts also forced my hand.) I'm very pleased with its construction. Its upper clamp stays put (unlike the Evo's), and the telescoping action is so much smoother.

One problem has surfaced, though. The blue coating on the outside of the lower has worn away very quickly, leaving long streaks that expose the Ti beneath.

Has anyone else run into this problem? If so, is there any handy way to fix it?

TIA,

ECB