Maybe a headlite polishing kit. The ultimate fix would be replacement with used part. Cant be that much for lens,if you go that route,just dont drop the circuit board when you take out the 7 screws on the back.Nothing holds the internals in but a compression fit.Do it over a towel,over the bench.
Question, why are you bleeding from the master? Dont you want all the air out of your system?
RSD.