Cheers that makes sense I will try them products and see how it goes. I did wonder what the benefit of wax was but I'm thinking its a protective layer after polishing. So I don't need to polish or re wax after every wash then just use a detailing spray after washing to keep it shiney. Thanks
That's pretty much the idea. If you have time to strip back the wax, then polish, then wax again, you will get better results than giving the existing wax a going over with a quick detailer, it just depends how much time and elbow grease you're willing to give it.
In an ideal world you'd get a proper machine polish and paint correction, then maintain that with the wax. But I've found SRP applied by hand is good for tidying up paintwork a little bit before you wax as it contains fillers which help with swirling and tiny scratches, that no amount of washing or waxing alone would really help.
Basically, do your best with the polish, sometimes in my experience two coats of SRP can yield slightly better results than one (although many people swear that it's pointless) and then seal up your hard work with a decent wax.
As mentioned by Horatio, it's a good idea to use a clay bar after a wash, this will make sure you're removing as many contaminants from the paint as possible before the polish. It's surprising just how much more dirt transfers onto the clay even after a thorough wash. If you've got tar spots or tree sap, that needs to be sorted before the polish, claying will help that but there are also some specific products that target those.
Before HD Wax, Autoglym had Extra Gloss Protection, which was 'ok' for adding a bit of extra glaze over a polish, but it's pretty much redundant now we've got HD Wax. I'm not sure whether adding a second coat of wax is a good or bad thing, but it's something I'll probably try.
It's helpful to have a good set of clean microfibre cloths for SRP as it can get a bit chalky when you apply it, and a couple of fine finishing cloths for a final going over once you've buffed off the wax, just to lift off any odd traces of dust. Pick a day that's not scorching hot, and try and do it out of direct sunlight.
Good luck!