I've had the car done inside and out and have been out and bought some Mguirs shampoo and wax.

Is it ok to wax after the treatment ? I don't intend to use any polish but thought the wax treatment would work alongside the Supaguard.

No problem at all using a wax over Supaguard.

But the megs wax has ery little durablity, there are lots of much nicer finish, and longer durability wax's out there.

Try this one out, it punches way above it's weight for the price. The finish can be compared to wax's costing 5 times the price. Plus a tin will last years, I've had about 20 coats out of my tin and still have around half left still.

The finest car care and automotive detailing products available.

PM me and I can give you a discount code