I have been reading so many useful threads to assist me with my gtv restoration project in all the areas, some quite daunting for me to tackle. I think the time has come for me to give back a little of my personal expertise.
Firstly a bit of my credentials: My business of a handful of employees in Australia is to service glass. One of the contracts we have is with a prestige car company in Adelaide [which own the rights to sell Audi, Bently, Aston Martin, Volvo, Landrover etc blah blah] is saving glass on vehicles from having to be replaced. [you would be surprised how many of scratches are on brand new cars caused by techs, detailers and tinters using scrapers to remove stickers etc]
So this thread is a ‘DIY How to’ for scratches to glass [this only works on alfas…lol].
I personally have quite an involved tool box I take with me on site but I endeavoured to create this ‘how to’ with almost only hardware products.
What you need:
I have a picture here of a wiper arc scratch from a neglected wiper that has scratched a semi circle in the windscreen. It’s quite substantial and you can feel it with your nail.
The DIY kit:
1. Spray bottle with water
[Preferably demineralised or pure Reverse osmosis water but not essential on a small job].
2. Small sanding kit with arbour for drill attachment.
This was a rust removal sanding kit from hardware should be pretty cheap anywhere.
3. Compacted felt polishing disc.
The one I bought had the same plastic screw attachment for the backing disc but you could glue a felt pad to one of the spare sanding discs if it doesn’t have an attachment.
4. Heat resistant foam about 4-7 mm thick.
My hardware didn’t have this but some do. A rubber and foam co will of course but foam without heat resistant qualities is not essential on a small job as I use this film on vandalised shop fronts and some foams melt at high temp.
5. Variable speed drill roughly 3-5000 rpm.
6. Lint free cloths and masking tape [to mask off duco if the scratch is close].
7. Scissors and nail brush
8. Cerium oxide [lapsa] this is the only product that wont be at most hardware stores but I have provided a link to easily get it on ebay cheaply [about 5pounds]. If you search cerium oxide a variety of polishes will come up. The one you want will be peach or pinky brown in colour [also known as lapsa]. You only need a couple of pinches for each job so it will last a DIYer probably the rest of your life.
9. Wet and dry sand paper. In the picture I have 1000 and 1200 grit but I also used 600 as the scratch in my windscreen was deeper than first thought.
10. Small bottle of quick dry super glue. [I use Selleys]