I recall the blood sweat and tears of dried on car wax that was like baked tar to get off a car in my youth on my dad's cars.
On my own car I used Auto Glynn super resin polish and it was suspiciously easy to remove
What the best polish out there in your opinion?
Good aul' Turtle Wax. They say it's more suited for use on older vehicles. What age is your car?
Might get good advice on the detailing forum - https://www.boards.ie/categories/car-detailing
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Fusso do a wax for light coloured cars - haven't used it myself but tends to be highly recommended. https://pirategarage.ie/product/soft-99-fusso-coat-light-200g/
Fusso can be a bit "fussy" to use but is excellent. I think Bilt Hamber double speed wax is a really good all rounder, isn't expensive either but saying that I'd go for something like Gtechniq C2 v3 as it's easier to apply