WD-40 as a relatively gentle solvent/cleaner is an old detailer's trick. Been using is as my primary tar remover for several years with no problems - ever. No damage to paint, etc. Mostly Kerosene in a spray can... A good washing with soap and water removes all WD-40 residue. Whether on brakes or anything else. While I wouldn't drench my brake rotors and pads with it on purpose... I also don't fret if I get any on there... I just wash it and it's gone... Works really well on globs of tar that you often get on the inside of your rims, too. Sometimes takes a few sprays with a little soak time in between to break all that up.
WD-40 isn't a lubricant, it's a water displacing coating. It evaporates in a couple of days. Hose your brakes down all you want, the lubricating properties of WD-40 are short lived. Dave
Exactly!!! In fact the name" WD- 40" is derived from it's description when originally specified by the military....Water Displacement 40.
Yeah.... And the 40 stands the 40th recipe that finally worked.... So stay away from WD-39..... Now then, what about 3 in 1 lubricant.... Nah, don't want to go there.....