I've used autogylm super resin and it's amazing and easy to apply on and off two years back on the tt and it came out like new and did last for ages as kept on getting compliments on how the car was shinning all the time and I didnt even wash it for a few months and had very minimal scratches on it but living in London and using these fecked up car washes doesn't help with black cars and I've noticed many fresh scratch marks over the bonnet mainly and one on the roof today from the last time.
Can't afford to pay £40 for a polish right now sadly so may just get a bottle of super resin and see how that goes and a cheapo wax too.
As long as whatever wax you put on top of the SRP does it justice.
There's probably waxes for a quarter of that price, that might do a decent job. I haven't used one to recommend though.
Only reason I went for the HD stuff is that it was stacking up very well in reviews against much more expensive stuff. And you get lots in the pot. I've had it for a year and I'm not even halfway through it. It's very good value.