I thought the point of EGP was that it was an alternative to wax? I thought you use EGP or wax to finish, not both.
From Autoglym site:
Q: Is Extra Gloss Protection a polish?
A: Extra Gloss Protection is not a polish, it is a liquid wax. It will not remove or improve the appearance of scratches, swirls or dull paint. If your paint has these problems use Super Resin Polish first, then seal in and protect the surface with Extra Gloss Protection after.
Q: Can I use High Definition Wax after applying Extra Gloss Protection?
A: If you use Extra Gloss Protection then you don't need to use High Definition Wax as well.