PART THREE, of FOUR:   5 February 2009 PREPARATION OF POLISHING TOOL : Returning to practice to cover the tool with "candy squares of pitch", to be pasted on the same, with simple local and light softening one facet of the squares with a candle flame,, and then fixed in position on the glass with a little thumb pressure;, You may want to read my article with various photographs on this … Continue reading Mirror Newton Ø250F5; Diary of realization (3)