Sanding the back of the stock gauge face, Exactly how much do you sand off? And what grit? Options

[GriffGirl]

In my perpetual quest for perfect custom gauges, I have removed my cluster - ONCE again - much to the amusement and chagrin of my coworkers. I have FINALLY found the thread outlining the sanding bit but it doesn't exactly specify just how much to sand off the back and with what grit paper. Do you sand down till those white dots are gone? Or just a "surface" touch up because those white dot thingies have yellowed with age and time and that's why my lovley LED-lit cluster lookes like diluted pee?

Thanks!

[GriffGirl]

You guys all suck This thread ostensibly contains a veritable cornucopia of cantankerous guys.

Anyway I figured out on Friday about 2 hours later when no one would help Death with his horn wiring and no one even TRIED to attempt anything about sanding the back of the gauge faces that I was on my own. 22re - it's the actual back of the gauge face when you pull it up from the clear plastic. The back side of it has like a black and white dot pattern. That's what shall we say "filters" the light resulting in its undesirable output.

So I used nylon scotch-brite stuff on it till the black stuff was gone. Now it's crisp and bright LED white! Faboo!