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Alcohol and chemicals in general will dull and wear off any wipe on sealant that is not chemical resistant. Varnishes are soft coatings, so they can be damaged by chemicals like glass cleaners, engine degreasers, bug removers, spills from engine coolant, brake fluid, transmission fluid, ect...

I hear ya, but nickel is still considered a soft metal. For example, it is used in many cheaper eyeglass frames and tends to corrode fast and some people are allergic to the oxidation, so eyeglass shops will recommend harder metals like stainless or titanium frames. The harder the finish, the...

Either. The important factor is that the headlight sealant is formulated specifically for plastic headlights and is scratch resistant (very hard). Hardness (scratch resistance) is associated with durability. For example, compare the durability of hard finishes to soft finishes. An example of...

Avoid any coating that is not clear. These dark wipe on coatings will only get darker with age.

Everything ray6 said is true. In my 12+ years of restoring lights, my advise is to use a high quality sealant made specifically for headlights. The best ones will have high scratch resistance that can handle the abuse from automatic car washes without scratching or peeling off. Simply divide...

I used varnishes years ago, but now use a headlight specific sealant. Varnishes can last up to one year, then they get dull, darken and wear off. Those providing headlight restoration as a service will need their work to last 2 or more years to have a good reputation in their community and get...

Strippers are solvent based. Any chemical stripper would disolve both the hard coating and then severly melt the underlying plastic headlight. Coatings and plastics are both resins and will suffer the same from a chemical stripper. Sanding and sealing is the best and only method that works...

That true, wood polyurethanes are already slightly yellow when new and get darker with age.

There are always people out there willing to work for cheap to make a fast buck. Most often than not, those people are not about high quality and therefore do poor or at best only an average quality of work! Explain to your customer that for $40.00 you will briefly and lightly sand with fine...

$40.00??? Is that all you're worth? You should be charging $80.00 at least for all the work involved to make them look perfect. $40.00 is for the guy just running a buffer over them with some polish. If your going to do the labor of sanding them with different grits and apply a seal, you...

True, all finishes eventually break down and yellow with age, but the factory finish is far superior and more durable than any air dry clear coating. Customers should not expect to get more than six months to two years max with air dry coatings.

Looks good, but it is well known that urethane yellows over time.