Tripple will remove whatever waxes and glazes are already on there.
You can re layer the carbon (awesome wax by the way) provided that after you've washed the car its still coming up spotless. You don't want to wax over dirt or contaminants that won't wash off.
A quick detailing spray like AF finale, zaino z6 are great for bringing the just waxed look after washing, finale is very good at removing water marks if you suffer from hard water.
With newer type spray sealants like reload and C2, there is the option to apply them over a wax as they seem to bond fine, to keep the looks of a wax, but also add more protection and improved water behaviour.