As it won't do any damage spray it on your forks and leave overnight and then wipe it off. After you could spray household furniture polish on and wipe / polish with lint free cloth. My dealer used furniture polish on all his bikes in the showroom.
Hi, WD40 sprayed on a cloth and then wipe your forks, it won't damage your forks and should take the marks off.
I spray most of my metal parts on all my bikes, just don't spray it near brakes or on a hot engine or exhaust.
Hi, Has anyone rejected there bike under the sale of goods act as being unfit for purpose due to very poor fueling making the bike hard / dangerous to ride.