Can it be done?If so how?Has anyone done this before??I have 3 greddy gauges(60mm)that i want to change the green lights out for red.Anyone??

I'd say no. The color is likely produced by a colored film behind the gauge face, much like the OEM gauge cluster.

The outer bezel ring is stamped on and that's the only way to get under the glass.

Hey caesar.. arent you trying to sell those guages??????