Looking for some advice chaps I'm rebuilding a 1000DS after the horizontal belt let go - heads are all rebuilt with new valves and guides , and the bottom end was deemed fine as I was lucky with light touching of the piston to valve On cleaning up the pistons prior to rebuild there are signs of where the piston / valve met and I'm looking for advice on what to do with this Should I leave as is or will I get some hotspots ? Should I polish out ? Thanks
