be carefull with metallic paint.. I put a blemish in my paintwork with T-cut.. but managed to get it out in the end by t-cutting a wider area... as chris suggested.
The zymol the area in long strokes instead of circular... worked a treat
I find that with colour Tcut it is just covering up ols scratched so they do not show and after a few washes the same scratches are apparent.
I want to get hold of some normal cutting compound the professionals use... not T-Cut cutting compound for dummies