Tint Slayer

I use this- https://www.amazon.com/dp/B00FJUZY8Y/ref=cm_sw_em_r_mt_dp_U_Bh4GDb3V1PHMM

Get a thick crappy brand, thick so it wont break apart when removing and crappy so the adhesive won't stick, check out some Chinese films. Another option may be to try weaken the adhesive before install. like maybe add a little baby oil to your slip to keep it from fully adhering.

You wont be able to figure out how it got that way, but if you have a really good car warranty that covers everything, and the defroster doesn't work, you can remove the tint and possibly they will replace it. If you're a little OCD and it just can't be like how it looks, you'd be surprised how affordable a back glass replacement is.

LA's Totally Awesome cleaner is good for that - https://www.dollartree.com/las-totally-awesome-all-purpose-cleaner-20oz/152664

As a suggestion to help with the issue, I have 2 of those cheap square 20" box fans they have at Walfart and basically everywhere for like $15-20, and i put these 20x20 filters on the intake side so the fans suction holds them in place and it makes a great air filter system that you can direct the air flow. I shut them when i have to, but good for leaving on overnight. 20x20 filters (i use merv 13 rating because i use them at home too my kid has allergies, you can use merv 8, 11 and 13, the merv 14 and up are for medical environments)- https://www.amazon.com/dp/B01HTL3W02/ref=cm_sw_em_r_mt_dp_U_tBqCDb81H3G6C Fan- https://www.walmart.com/ip/Lasko-Cool-Colors-20-Box-3-Speed-Fan-Model-B20301-Black/22614935

Not thinking it was you, could've been when she was at a store and someone else did it pushing the rubber up

the rubber towards the bottom looks slightly scuffed and damaged and looks like something hit it pushing upwards

if you know what you want then 44tools.com if you want to talk to a human to guide and be friendly then call the folks at www.sundistributingdirect.com

My GF's kid uses the item in the link below, the front defogger has some issue that makes it continually not work no matter how much it gets fixed, so this was the solution for a few years now, not this particular model in the link but similar- https://www.amazon.com/dp/B07JYPJKG1/ref=cm_sw_em_r_mt_dp_U_qLOzDb87NCQR7

Holy chit wtf lmao, and there was also a whole 10 seconds i stared at your reply not knowing what you're talking about lol i meant Flat glass or auto

Car or auto?

I was thinking about this when i drove my daughters car last night, it has a hatchback and not tinted and i get the red color from the 3rd brake light day and night (the lights stay on), covers the back hatch area enough to be seen as red on side glass as well, i think some of it came from the brake lights on each side of the hatch too. Have the customer show you exactly what it is, i get people who say this odd kind of stuff but can't reproduce it when in front of me.

what color car and interior?

Why not back and forth?

Ratio is usually 1 oz per gallon which comes out to about 8 mls per quart/liter. I'm usually within 8 mls up to about 12 mls (12 when i need extra slip) of Dawn Simple Clean per quart or liter.

You either gotta cut bait or fish, your boss is staying focused on his main moneymaker, and ideas like yours could leave him open for liability. You may have better luck asking him to rent the booth after closing time each night, but in his head he'll picture people walking around his place when he's not there. Also, if you're as good as you claim, he's not going to help you build what he may perceive as your new business and lose his painter. Some people like to stay in that comfortable "if it ain't broke so don't fix it" thought train.

flexible sandpaper wrapped around an old squeegee or wrapped around a hard card wrapped with a towel works decent https://www.amazon.com/dp/B00LIXEKZ4/ref=cm_sw_em_r_mt_dp_U_3BAsDbDBXFBGT

I'll give you an actual answer instead of trying to sell you something else, no that tank won't work, having a top like this is the easiest to work with and modify:

Anybody test out and determine what grit you can use on the glass without scratching or blemishing in any way? I see people using less than 1500 grit and wonder how it's not scratching the glass or doing something to it somehow. One guy on FB a while back said he uses 400 grit on the whole back glass using a drill attachment. What's the roughest grit you've used successfully that won't scratch the glass?

and good for drying up some dot matrix on the inside of glass i feel like you'd like the item in this link with some heat tape wrapped around the end: https://www.amazon.com/dp/B0752Z4165/ref=cm_sw_em_r_mt_dp_U_YAeqDbX16PR0T

if it's scratched looking could be glass that was scraped with the wrong blade, or a dull blade, or a blade that caught something while scraping that made the edge bad and they kept scraping maybe the edge progressively worse, or a blade used when the glass has a coating a blade shouldn't be used on.

I rarely hear anything good about Suntek but it seems like a lot of people use it, why?

Maybe someone over-used an adhesive promoter or their own glue cocktail to stick that on. I use ATR to remove adhesive and it kicks ass, i don't know why everyone isn't using it. https://44tools.com/atr-adhesive-remover-1-gal/

Get a longer file for longer cuts and save time- https://www.amazon.com/dp/B001R1UZPQ/ref=cm_sw_em_r_mt_dp_U_y0YnDbCQVJGYD i use these for the ends that go into the rubber if needed, thin and flat and good for fine control with a slight flexibility to it, could probably us it for all filing- https://www.amazon.com/dp/B007YRCIWA/ref=cm_sw_em_r_mt_dp_U_E0YnDbPW350EX

and/or this 24" roll of carpet tape, comes in 36" also good for back decks and making quarter glass templates - https://www.amazon.com/dp/B07FMHJ4YW/ref=cm_sw_em_r_mt_dp_U_w8CmDbZ4ABNGR