Advice please had some flint off Woody got hold of a old file got a section snapped off thanks to my daughter doing it for me .I have been house bound for last few weeks apart from being in hospital long story .
Tried it tonight got a great edge on the old file but getting hardly any sparks but chipping bits off the flint . I have been trying to google what I am doing wrong and one thing I have found is some people heat treat the file but what I have also read is if the file snaps clean when hit with hammer it should be ok to use ,My daughter leaned the file against the wall one thump and it snapped clean .
So any ideas what I could be doing wrong
Cheers Gerry