What is Reddit's opinion of 3M Headlight Restoration Kit, Simple Process to Restore Cloudy & Dull Headlights, Hand Application, 1 Kit (39084)?

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For clear plastics I personally would go with a headlight restoration system. That would give you the steps of sandpaper grit, polish, and UV clear coat that you would need to get them clear. Something as small as gauge plastics might be better with a hand kit, but they do make drill-attached ones as well. I like the 3M for headlights: https://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=sr_1_28?dchild=1&keywords=3m+headlight+polishing+kit&qid=1605231291&sr=8-28

i used the 3M kits they sell at autozoe/pepboys/amazon

https://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=sr_1_14?s=automotive&ie=UTF8&qid=1516723012&sr=1-14&keywords=headlight+restoration+kit

Ive used it probably 3-4 times over the years on my cars and my fiance's. It looks great and the longer you spend on each step the better it looks

all you need is drill to put the attachment for the kit which helps sand and buff the head lights.

I used this kit from Amazon (Not an affiliate link). Expect to spend about an hour and a half on it but it's more than worth it. I will let you know that the kit I linked does not come with a UV sealant which is definitely something you will need. If you don't seal your headlights, they will go back to the yellow fogged look after a few months.

So was I. This is the one i bought , but they make several kits and even the in-page description is for a different one. 39084 doesn’t include the drill attachment or a sealer. I guess since the others do I’ll definitely need something?

3M headlight kits should come with an assortment of sandpaper that you can use. The last one I bought had 800, 1500, and 2000 in it (and maybe 500?). I'm pretty sure it was this kit.

As for the other sandpaper, I've tried OTC and 'no name' brands and found the quality to be pretty shitty. The Meg's is a little pricey but I haven't found anything that can match the performance.

I have a Meg's sanding block that I also got on Amazon. No complaints on it.

Good tires. I like the General Altimax RT43. Regular oil changes. Regular tire rotations. Fresh fluids all around. The simple easy shit we all should be doing really.

You could also hit up your local walmart/auto parts store and buy the 3M headlight resto kit. Will get the haze off the lights and leave them shiny new for a bit. Helps a ton when there is no haze on the lenses.

https://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=sr_1_1?ie=UTF8&qid=1504839693&sr=8-1-spons&keywords=3m+headlight+restoration+kit&psc=1

This followed by this fill out to find the part # and search on Amazon as well

I've used this 3M manual kit to restore the dustcover on my Technics Q2 to "like new" condition, but it took about 4-5 hours and my hands were numb till the next day. Then I tried this Mothers NuLense kit with the same result (restored a very rough dustcover on SL1600mk2) but it was much easier since you can use a drill attachment for all those sanding discs and polishing pads.

When what dried? Did you seal it? If you used a sealer before you buffed and polished the lens that's what could have caused this. What you need to do is restart. Sand the sealer off, and then take it easy with the sanding. And by sanding

I mean wet-sanding. I hope you weren't just using sandpaper and no lubricant lol. Wet-sand it back down till it's smooth and hazy. Then take some rubbing compound and then buff the hell out of it till it's clear. I went crazy with mine and buffed them for a couple hours each, but i go overboard on everything. After it looks clear, wipe off the excess and let it dry. Then spray your sealant on it. Like spray paint if you get too close it'll drip, too far it won't cover fully.

I actually wet-sand mine with the 3M restoration kit: https://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=sr_1_4?ie=UTF8&qid=1493511799&sr=8-4&keywords=3m+headlight+restoration+kit

And for a sealer i used: https://www.amazon.com/Presta-137306-Headlight-Sealant/dp/B0082LFOFA/ref=sr_1_1?ie=UTF8&qid=1493512126&sr=8-1&keywords=renulite.

Expensive sealer I know. But I did research on it and a lot of shops use it. They actually give 3 year 30k mile warranties with it when they would redo headlights for people. So it's a good product. I used it on mine about 4 years ago and it's just starting to come off.

Hope this helps!

https://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=pd_sbs_263_3?ie=UTF8&dpID=51R8j-pEZhL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&psc=1&refRID=3R050XY8877V8YZV8AYY

or this one?

It was this kit from Amazon.

http://www.amazon.com/3M-39084-Headlight-Restoration-Kit/dp/B006VB8JTQ/ref=sr_1_4?s=automotive&ie=UTF8&qid=1435952975&sr=1-4&keywords=3m+headlight+restoration+kit

Works really well.

I bought the headlight restoration kit from 3M and it took about an hour and they look pretty much brand new now.

http://www.amazon.com/gp/product/B006VB8JTQ/ref=oh_details_o05_s00_i00?ie=UTF8&psc=1