First off I searched and I couldn't find anything.  I took the rubber off of my climate control knobs and I would like to paint them blue so they contrast with my white HVAC overlay.  Is there any special kind of paint that I should use to paint these with or not?  Also should I spray the back or front?
 
Stained glass paint from a craft store will work.
Spray the backs.  That way the paint does not rub off after extended use.
 
 
I actually opted for the one that uses a brush.  As long as you do VERY thin coats until you're happy with the result, it'll never come off.  Try rushing things with one thick coat and you'll be soooorrrrrryyyyyy 
 
 
 
If I use the glass paint will they glow blue at night or not much due to the paint?
 
Stained glass paint is designed to dry mostly-transparent as long as it is in thin coats.
So, in effect, yes.  They'll glow blue.
 
 
you can also use that metal cast paint from dupli color since its a top coat you can see through it thats what i used on mine
