Hi Bojan,
You can always use "Cerium Oxide" to polish glass or plastic.....Just be careful with the plastic items though.
It is much finer than rouge & windscreen replacement firms use it to polish any scratches out of any glass items they come across.
Cerium Oxide can be purchased off eBay at very reasonable cost.
Here's a link for you...
Reduced via tiny URL...(eBay link is way too large.)
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https://tinyurl.com/272tq7v9
Lots to choose from but this should suit your requirements.
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Just use a small clean glass container & mix a small amount (a dessert spoonful is more than enough) of cerium oxide with plain water to the consistency of Brasso or just a tad thinner.
Apply with a small piece of clean flannelette (shirt) material & carefully apply in a circular motion.
Do not concentrate in one area.
Wash off with clean water.