police are hunting two schoolboys who doused a fellow 12-year-old pupil in highly flammable wd40 in an underpass before threatening to set him alight .
they sprayed the highly flammable wd40 , usually used on cars or locks , over him before producing a lighter and threatening to burn him .
the 12-year-old victim , who has not been named , was walking in the subway underneath a major road in newbury , berkshire , when two boys - aged about 12 to 13 - approached him .