Hi mate,
A polish will have a cut in it and should be used before waxing, after claying / washing. AutoGlym show shine is a quick spray that you use in between monthly waxing efforts (for example) and in itself it neither a polish or a wax. More a water spot remover that adds a tiny bit to the shine. I love it in the summer to keep the car look good each day!
For a polish, I'm using AutoGlym Extra Deep Shine at the moment. Designed for newer cars it works wonders over SRP. As for other polishes, I'm sure others will be along with how much or a pain AG is to use plus some other suggestions.
Cheers dude, when i used the sample of AG SRP you saw the difference it made on my bonnet, does the EDS have a better and deeper shine?