I have been doing powder coat professionally since 2000. If the coating is done right and all necessary precautions are taken there is no problem powder coating a marker. It all depends on who you have do the work.
Smart Parts Ion
TechT L7v2, Virtue, CP Sling, NDZ Low Rise Clamp, ASA, Smart Parts Progressive 14", Crossfire 68/4500, Kila Magnetics (what else?), Hybrid 08 Skulls, Smart Parts 360 QEV.