3M 39073 Headlight Glass Restoration Kit to Restore Dull/Fade/Discoloured Headlights, 1 Pack, Multi-Colour

As with many other people I was a little sceptical about taking sanding discs to my headlights, but they were in such a state that it was either that, pay a professional £70-£100 to renovate them, or replace the units (£100's more!) to avoid an MOT failure. After checking reviews and narrowing down the choices to either this kit from 3M or the one from Autoglym (both names and brands I've used before and trust), I decided the edge was with this kit and went ahead with the order, adding the small bottle of UV sealant in order to ensure that whatever finish I ended up with would at least be protected from future sun damage etc. I then waited for a good, dry and fairly sunny day so I would be able to see what I was doing and get all my lights done in one hit, cracked open the kit and got stuck in. I got through three fully charged batteries on my Ryobi cordless drill (set to the lower speed setting 1) and my arms and hands still ached a day later, but the results were just as promised by the blurb on the kit, much to my own surprise and relief. Even my mother-in-law said they looked like new units when I was done about 3 1/2 hours later, so it really does pay to (a) read the instructions and follow them to the letter and (b) take the time to do the job right. My lights went from heavily yellowed and fogged to 'as new', so if the UV sealant I applied (two coats, apply, leave to dry, buff off & repeat) after washing everything down when I was done do their job then I'll be very happy, with clear, bright, safe lights again, a must now that the nights are drawing in for winter. Some observations: Don't apply too much pressure when sanding - a light drag feeling that doesn't make the drill's note drop seems best, and use a combination of strokes depending on which disc is on the pad. For the early stages with the coarser pad, shorter strokes that repeatedly go over a slowly widening area were best to show the layers of lacquer and fogged plastic coming off, moving onto longer, more even passes across the whole light unit when you switch to the finer sanding discs and the polishing pad. Be thorough and make sure you've really cleared off all the old lacquer so that the headlights really do go a uniform milkiness - that's the scariest part, and the one at which both myself and anyone watching sucked their teeth and shook their heads in doubt, but stick with it as it really does all come good in the end. I have a W211 model E Class and so had four lights to renovate, two 'side' lights and two main headlights - if you have the same model then open the bonnet before you mask up. It means less masking and much easier access to polish/sand the tops of the light units. I did one set with the bonnet closed as I was concerned about how much dust would be made, but it really wasn't anywhere near as bad as I'd feared with the majority falling down in the direction of the drill's rotation so when I moved onto the second pair I opened the bonnet and found the whole process much easier as a result - lesson learned if I ever need to do this again! Also there were enough sanding discs, polish etc. in the kit to do the whole job, so unless you have lights the size of windows you should be fine for pretty much any car I'd think. In short, if you're having doubts then don't - this kit really does work if you follow the instructions and take your time to be thorough and careful. My lights look amazing now and I keep going out to look at them as I still can't believe how much better they came up - thoroughly recommended kit! Just remember to get the UV sealant as well and apply two coats to make sure your hard work and effort are protected from the sun longer term. I'm going to give my lights another refresher treatment with the sealant every month or so when I clean and polish the car so that hopefully the renovated finish I currently have will last long enough that I won't need to do it again for a number of years.

Really good product. I was a bit apprehensive about the process, especially when the lenses were white after sanding but they came out amazing! I bought this item in October 2025 and only just got round to doing it today. I noticed I had reduced beam while driving at night so I had a word with myself and got it done. Really good results.

A good product that restored 11 year-old lights pretty much as described. The before and after pictures in the advert and in customer reviews closely match my own experience. Written instructions are clear and the video on the 3M site is helpful, but could have given a bit more detail in how to go about the job – felt more like a montage of before and after pictures. Job took me about 2.5 hours, including several readings of the instructions and views of the video. The drill bit and sanding/ polishing pads all worked well although as other reviewers have noted, you have to be careful removing the pads from the bit as the heat softens the Velcro layer on the bit and it would easy to take the Velcro off with the old pad. I only have a couple of issues. First, there wasn’t enough masking tape in the pack, I bought an extra role which was needed. 3M’s examples are for relatively small lights, with simple shapes. I was working with a single headlamp / side indicator unit that wrapped round the front corner and extended back into the wing some distance and needed more tape than supplied. Dropped a star in the review for this. Second issue - more to do with my lights than the product. The grinding/ polishing pads are very effective on simple profiles. My lights have a recess around the main projector lens on the front and the section in the wing where the indicator sits has five profiles, all of which are quite shallow. This meant that the pads could only contact across a small section of their area and quite often the edge of the pad was grinding on the neighbouring profile. All this made it hard to get into the edges of the profile for a consistent finish. It’s minor – there are some bits that I will get back to with wet n dry paper by hand – but something to bear in mind if your lights aren’t the relatively simple designs used in 3M’s examples. Overall, good product and happy to recommend.

Sehr sehr gut, wirklich bin sehr begeistert auch 2 Tage eher geliefert als es sollte. Leider kein UV Schutz dabei aber nichtsdestotrotz sehr geiles Ergebnis, wird bestimmt 2 jahre halten und damit hat es sich schon bezahlt gemacht

Ottimo risultato garantito!

Produit très efficace, déjà utilisé pour plusieurs véhicules et toujours avec un résultat optimal. Ici les photos pour une C1 parlent d'elles-mêmes. Bien suivre le mode d'emploi, prendre son temps (une bonne heure par phare). Personnellement avec le grain 800 je fais une passe à sec, puis une à deux passes avec de l'eau avant de poursuivre au 3000. Le coffret suffit pour deux phares, mêmes très opaques. Les disques sont endurants et restent mordants longtemps. J'ai consommé deux 500 et deux 800 seulement pour cette C1 assez abîmée. Il y a assez de polish (rose) pour lustrer, il en reste pour un entretien ultérieur. Il manque juste un vernis anti-uv de finition pour que ce produit soit parfait.

He pulido con el producto los faros de un Peugeot 307 con 12 años de antigüedad (tras pasar la ITVhace unos días, indicaron un fallo leve, debido a la opacidad de los faros, quemados por el sol) y han quedado bastante bien, teniendo en cuenta que era la primera vez que realizaba esta operación. Recomendaría el producto.

J’ai bien suivi les étapes de la notice qui sont très simples. J’ai utilisé une perceuse/visseuse sans fil Bosch pro, c’est largement suffisant pour effectuer ce poli lustrage. Ne pas oublié d’appliquer une céramique à la fin si vous souhaitez garder le résultat sur du long termes.