Touching up your sights

[littlejerry]

What do you guys use for touching up your sights? My Warren rear sight has a decent amount of wear and the edges are now silver which is hell on my eyes at the indoor range.

I tried using a sharpie but it left behind a sheen that reflects light.

[orionz06]

Birchwood Casey cold blue pen.

[JAD]

Fluorescent orange Testor's enamel. You get a free sample with your AARP membership.

[SPDGG]

Birchwood Casey cold blue pen.
+1 Works great