@ I’ve got an Astra Turbo with the factory fitted Xenon headlights but they are very dull looking and the glass seems to be a sort of yellow colour. I’ve tried cleaning them and also tried to give them a polish with T-Cut but it hasn’t made much of a difference. I was wondering if this can be fixed or if not, how much it would cost to have new lights fitted as the light they emit is really quite poor now. Thanks, Henry.
AHi Henry. First up, without knowing how old the car is, we can’t give specific figures but regardless of age, replacement Xenon units are very expensive so we’d pretty much disregard that option for the time being. The good news however, dull and discoloured lenses can be improved fairly easily. Unlike older models, the Mk4 Astra onwards has plastic lenses and thus these can be carefully polished to remove the marks. Granted some marks are just too deep and if the plastic itself has turned milky, there’s nothing can be done but assuming the discolouration and marks are on the surface, this can be addressed.
There are a few bespoke kits which consist of an abrasive polish and some applicators. T-Cut is no use and should be relocated to the nearest bin. You can also use a cutting compound and a machine polisher but be aware that much like the paint work, over-enthusiasm and too much pressure or speed can actually burn the lights. One option is to use a fairly aggressive compound and with a low speed selected, slowly buff the lights and remove the marks. A finer compound will refine the finish and a good polish will help keep them clean. Some people have had good results with using increasingly fine wet & dry paper too. It’s worth knowing that it won’t last forever but once they’ve been done once, it’s far easier to keep them clean. This applies to pretty much any car with plastic headlights.