I'm currently in the process of bringing the red paintwork on my mkIV back to it's original glory, i'm using a combo of AG shampoo, T-Cut red colour fast & AG resin. It's had one treatment so far and the improvement so far is amazing, but compared to the red plastic areas it still needs a bit more work yet.
My question is how often should I be using the colour fast T-cut? I'm told that too much use will batter my paintwork, but others have said use it all you want?
If it is a case of T-cut very occasionally, what product(s) can I safely use regularly to keep restoring my car's colour?