sounds like you've over done it ....T-cut is an abrasive designed to wear away the oxidized top layer of paint when it becomes dull. If you overuse T-cut you will eventually wear away all the paint.However if you use it to often or to hard it will remove the color from the paint and leave a dull paint finish.
here is a link ..you could email them for you answer hope it helps http://www.carplan.co.uk/index.cfm?page=1