Join Date: Jul 2006
Location: Newcastle upon Tyne
Car: MG ZR+ 120 Mk1 (53) & Rover 25 GLi Mk2 (06).
Yes polish is abrasive, even the most mild polishes will remove your wax.
The Auto Glym Aqua Wax as mentioned above is very good for a quick wax top up. I've got some and use it occasionally, if you're in a hurry you can't go wrong with it. Wash the car ,rinse and leave it wet, then apply this and dry off.
If there is a 3 for 2 on I'd also get some Auto Glym Rapid Detailer. It's one of the best over the counter detailing sprays IMO. With a detailing spray it's literally spray and wipe and your done, only on a clean car though so wash and dry first.
For future consideration when you have time to wait for things arriving from on line retailers, I highly recommend Finish Kare #425 detailing spray. It's my absolute favourite spray on - wipe off product for gloss and anti static slickness.
I always use it on my ZR. It can be used on the paint, the glass and plastics.