I really hope you are not suffocating in the heat we are experiencing here. Just praying that summer will be over. Gets worse from one year to the other

I know that I can polish glass either by
fire polishing [ to whatever dgree of polishing I want the shine to be]
or
by grinding and polishing, with various grits and then, pumice and / or cerium oxide.
BUT
additionally,
I hear about other ways too, and I would like you to confirm them - if you work this way. So please, anybody who works like this, please chime in, and we shall all learn from your experience.
1. By using HXTALL - yes, the glue. I heard it can be used as a polishing finish, it needs to be applied, probabely after the glass had been grinded. Anybody heard about it? works like this?
2. BY applying 'invisible sealer' on the glass - again, after it had been cleaned, or maybe sandblasted. Yeilds kind of satin finish.
3. By applying 'Clean Sheild shower and tile protectant'. Does it work on big surfaces? Does it clear also devitrification??
Is there any substance that CAN clear devit - or I MUST grind the the devit [if I do not want to re-fire]
Has anybody used any of this methods?
Have you heard about them?
Does this polishing last like the other methods I mentioned at the top of my question???
Have you got any additional trick that you might like to share?
I'd be so very grateful for any and every response, and guidance
And thank you in advance.
Havi