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Thanks to Ray6. A quickie search on the Internet finds that some of these brands do sell the sealer by itself. Most appear to require spray application and UV curing (sunlight or UV floodlight). Good to know!

I've noticed some people on this thread mentioning "professional" products for protecting newly "cleared" plastic headlamps, but never a mention of where one might buy them. There are some thinly veiled mentions of "not retail" as though they are some kind of deep dark proprietary secret. So...

Turning the headlights ON, high beam, helps also, by warming them up from the inside.

Has anyone had experience with the Minwax spar urethane getting darker in the can as it ages? I have a three-year old can that was opened, then I forgot where it was and it sat on the shelf. I just found it and the urethane seems darker than what's in the new can. There is NO visible...

The spar urethane WILL absorb a small amount of water, which then has to evaporate out. I've seen it take several hours for the watermarks to disappear. Update us...once the headlights were totally dry...a day or so...how did they look? If this is happening, do not wipe the headlights until...

If you actually applied 1:2, yes it makes a difference. 1:1 is 50% urethane, 1:2 is only 33% urethane.

I *DO* let swipes of the 50/50 spar overlap, but maintain a WET edge as I do so. Maintenance for me has been water and detergent wash only. Some car polishes and waxes contain solvents that can soften the polyurethane.

It's wearing off. As it does, the underlying surface texture starts to appear through the ever-thinning layer of urethane. I'm lazy on my own cars. I've seen them getting like that, and then when I have some spare 50/50 spar urethane left over, I wipe it right over the old stuff. Do it...

Here is a written description of the process, reported by a Doctor Headlight customer on Rennlist (a forum of Porsche owners): He first asked forum members about it: Then he tried it and reported back: ...which you can't see unless you are a forum member and signed in. The entire thread...

I think you're right. A few years back Hertz rented me a Pontiac Grand Am in Philadelphia (although it had Missouri plates). Both headlights were very badly crazed. The pattern of cracks, which were not really tiny, resembled that on a back or side window that was bruised by impact; the...

I posted on the other (spar urethane vs. opti-coat) discussion: "...on many Chrysler vehicles, the INSIDE of the lens deteriorates, too, though normally slower than the outside. Maybe other vehicles, too. Sad part: I've got a 1995 older Dodge Intrepid where this is happening FASTER on the...

AND, on many Chrysler vehicles, the INSIDE of the lens deteriorates, too, though normally slower than the outside. Maybe other vehicles, too. Sad part: I've got a 1995 older Dodge Intrepid where this is happening FASTER on the inside. The outside has not needed ANY treatment yet and the car...

If you use a lot of sandpaper and then make the surface very smooth by polishing, then when the urethane does weather away, it seems to look better, longer, by NOT revealing an underlying surface that has a roughness to it. My opinion only...

I don't know what formulation the wood varnish is, but lacquer thinner is a much stronger solvent than mineral spirits and could dissolve the plastic of the headlight, permanently damaging it. Depends on the formulation of the plastic.

I've put on a second coating after the first had thoroughly set up. If done quickly enough, it works. Too slowly and the old coat softens up and the overall result shows a "texture."

I think what's special about the "Spar" urethane is that it is intended for outdoor use, like the "spar varnish" of the past.

If you're allowed to tint headlights RED, that's just plain WRONG! :doh:

"...Notice the slight "ghosting" on the interior, it was there before restoration and unrepairable with this process, both lens have it, but the drivers side was the worst..." Your test vehicle is a Chrysler PT Cruiser; I've noticed this on a number of Chrysler-Dodge vehicles (including my own).

If that's the case, something is going amiss with your application.

To tell the truth, I mixed some and kept it, to see how long it would last. I had it in a 35mm film canister. Eventually enough oxygen got inside so it hardened in the can. It took about a month. I had used it after two weeks and all was well. Not that I'd RECOMMEND doing that, but I was...