sorry this is another guage thread. really sorry cause i even get sick of seeing them. but i have a quick question. i took my guages apart on my junk parts car cause i want to change the leds to blue. and now that i actually saw what to do i have a few questions. ok so the leds are clear bulbs. the back of the speedo and tacks and oil pressure guages and stuff are painted orange for the orange effect. when changing the leds to blue, i think i'm supposed to paint the back of the guages so it shows up blue. what color am i supposed to paint the back? what paint should i use to it doesn't scrape off after awhile or gets too hot or something? here are some pictures i took just as a reference.

the orange plate..