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So, a couple of years ago, the dear male member of the household (no name no pack drill) had the brilliant idea to use Santa Snow to coat the windows of the back porch entry because the pesky mud larks were bashing themselves into the glass, thinking the reflection was a rival.
Well, it worked a treat, so we left it there for a couple of seasons until the mud larks finally gave up and stayed away.
Today I finally got out my glass cleaner spray and bucket of water to clean it off.
I scrubbed and washed and resprayed and re- scrubbed but that stuff is not shifting. There is a horrid grippy feel to the glass - it wasn't smooth. It finally hit me that what had been used was not Santa Snow but glass etching spray.
So when you have picked yourselves up from the floor, are there any suggestions other than replacing the windows that could be tried? (Sorry, I couldn't upload any images - my computer is no longer recognising my mobile phone) Thanks for your time 
Hello @SquigsMum
Welcome to the Bunnings Workshop community. It's a pleasure to have you join us, and thank you for sharing your question about your window.
My apologies for the late reply. If the spray used was a frost effect spray, I suggest trying to remove it with a Trojan Safety Scraper With 5 Blades. I recommend testing a small corner first to make sure that it is a paint-based spray. If it is, the years have hardened its finish to the glass. Please take care not to dig the corners of the scraper into the glass, your goal is to uniformly apply pressure to the entire front of the scraper so that it moves horizontally straight and not on an angle. If successful the paint will come off like scraped ice.
However, if it is an etching spray, I suggest using Diggers 250ml Acetone Cleaning Solvent. Please test a small corner of the glass in combination with the scraper to make sure you can scrape off the hardened etching spray.
Please make sure to wear safety equipment such as gloves, goggles and a dust mask while attempting to remove the spray on your window. In the interest of safety, please note that working with glass is dangerous and applying extreme pressure to it will cause it to break.
If you have any other questions we can help with, please let us know.
Eric
Hi Jewelleryrescue,
I wanted to thank you separately as you were a "first responder" to my question.
I'm pleased to report that the 'santa snow' actually WAS a frosting spray and not an etching spray as I thought. My apologies for that - I'm no handyman- obviously! I thought I had the permanent stuff because normal glass cleaning spray and washing, scrubbing, etc wouldn't shift it.
My brother called in late yesterday afternoon and tried scraping a bit of the film off with an old Stanley knife blade.
That worked, so after he left, I kept going 'til around 9pm last night when the mozzies got too much for me. Finished it off at 7am today and cleaned the glass as normal - it came up beautifully!
When I read EricL's response today, he explained that frosting spray will harden on to the glass after time. So I've learned something new 
Thank you again for your valuable suggestions - they may well help someone who actually does want to remove an etching spray!
Kind regards,
Squig'sMum
Hi @SquigsMum
All that matters is the problem is solved you dont need to be handy all the time . I learnt a bit to so we are all winners.
Many thanks for updating us on your success, @SquigsMum. It's great to hear you solved the issue.
Please reach out anytime you need assistance around the home or garden; we're here to help.
Mitchell
