NAC How to Remove "Glass Chalk" from Painted Surface

[thejimrose]

+1 for wd40. if that doesnt work try rubbing alcohol, maybe brake cleaner?
as a last resort get some mineral spirits or acetone. on a  rag and be
gentle. be careful to test anything harsh on a not visible spot to make
sure youre not taking up paint [like under the hood]. ive also had great
luck w/ mcguiars 'scratch-x' - its a fine polishing compound in a tube.
it's a magic eraser for marks and paint rubs.

use a white rag so you can see if you're taking up paint.

IME wd40 is incredible as a solvent. it's super mild on paint but will
dissolve just about any type of gook. it's the only thing i use on
motorcycle chains - it melts chain lube grime but its harmless to paint.

and before the 'omg wd40 is a solvent... dont use on paint..' or 'wd40 will
coat metal and keep lubes from penetrating.. dont use on chains..' -
horseshit. ive been using it for 15 years and my bikes sparkle and i get
15k+ miles out of a chain + sprocket set.

mountain and road bikes too.. i degrease w/ wd40 since it's gentle to
paint, carbon, etc. then wash / rinse off the wd with simple green, dry
then lube. has served me very well.

wow.. way off topic.. =)