Mike - it has stayed on so far - but then my carry of R9 is very limited ... hoping that #2 R9 will be the ''workhorse''. In fact, where the pain is is well protected from abrasion with pocket or rig ... but hardly put it to ultimate test yet.
I think main thing is ..... prep' the surface properly - zero grease ... so, wipe off with iso propyl alcohol to ensure clean. I apply with toothpick.
We did discuss some while back .. the usefullness of having two small ''dimples'' either side of rear sight and a small depression on foresight ...... such that anyone wanting to apply paint could, knowing it'd be protected by being recessed. That to me would be way to go. The paint tho is inherently (it seems to me) pretty tough on adhesion.
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I'll just add that pic again .. my sight paint ..... slightly more precise than actual cos I tweaked the image a bit!
