I've noticed that over time small scratches may develop in the clear coating of the aluminium V-Slot extrusions. This isn't really unique to V-Slot it happens across the board with clear coat but figured this might be a good spot to ask. The surfaces I am trying to repair happen to be on V-Slot extrusions. Sometimes the scratches are from having something abrasive rub up against it like a screw or plate but even just setting it down on a work surface is enough to leave a scar. Has anyone discovered a method to clean these up to restore its otherwise perfect appearance?