Headlights looking crazed and faded can be brought back to looking as
new with various stages of flatting and polishing. Having a faded and
crazed headlight can now be an MOT failure and also be extremely
dangerous to you and other road users.
Did You Know? - 18.6% of All MOT Failures Are From Headlights. The
Which conducted a survey in March 2013 in connection with reasons
for MOT failures. They found that 18.6% of all failures were as a direct
result of headlights.