That why then mate. Sponges are the worse for leaving swirl marks as they tend to drag dirt across the paint not lift it off
. Get yourself a wash mit and a few decent microfibre cloths.
Also get yourself a some swirl remover and you might be able to repair some of the damage that has been done.
In answer to your question about Autoglyms Aqua Wax, I have found it a really good product. You can leave the car with some its of water on it, Spray on the Aqua Wax doing a panel at a time. Then use a microfibre cloth to buff it of to a shine.
I seem to get the same results by washing the car and giving it a quick going over with meguires quick detailer. I find this is easier to use.
Hope this helps