The automotive industry has evolved a lot, so has the world. We use commercial grade and military grade materials in our cars here just to sound deaden them. You may want to do a little research on Sanderplast, CCF and then check our audio threads
Moving on there are multiple companies providing acrylic and even teflon coating. Klasse is a German manufacturer of Acrylic Sealant having all these properties which you have mentioned above(which perfectly describes a sealant). The results are amazing, tried and tested.
DuPont provides teflon coating for enthusiasts.
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