Pon Engineers [P] Ltd. Offers Powder Coating Guns with Automatic Feedback Current Control. Pon Engineers [P] Ltd. Manufactures powder coating guns, reciprocators, touch screen control units, etc. The Powder Coating Guns with Automatic Feedback Current Control are programmable digital electrostatic powder spray systems. It is monitored accurately offering high powder charging and efficient transferring. This Powder Coating Gun incorporates AFC- unit useful for re-coating and complicated jobs. These guns are also supplied with digital air regulators.