What is Reddit's opinion of Armour Etch 15-0250 Etching Cream, White?

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How do I use this product called Armour Etch on pyrex glass? I have the kind of pyrex that is coated over so it does nothing to it. Is there a way I can rough up the coating so that the etch will work on the glass? Product:.

It can be done at home fairly easily, you need to laser print the design onto a transparency to act as a mask for when you expose the photo resist. You should be able to find photoresist film on amazon or ebay, i actually found this stuff too which you can use instead of acid to do the etching.

You need to etch with an acid. https://www.amazon.com/Armour-Etch-15-0250-Cream-22-Ounce/dp/B000XAN6NA/ref=sr_1_10?dchild=1&keywords=glass+etching&qid=1608342466&sr=8-10

I bought this on Amazon but craft stores may stock it as well. A little goes a long way.

Armour Etch