Can I paint ABS Pulsers ?

[HondaLou]

My ABS Pulser on front and rear wheels were covered in rust.  I carefully sanded at 500 grit and some fine steel wool.  
My question is if I can put a thin clear coat of paint on these to keep from rusting again? 
Hoping the actual sensor will still work with a coat of paint on them.  

Thanks for your help.