Cutting corex or other stuff with a straight edge

[Splash 1]

Something that I\'ve done for ages now that I thought I\'d share with yuz
When cutting with a straight edge always have the ruler placed over the good bit not the waste bit so the ruler is protecting the good bit, if the cut goes a bit wonky it doesn\'t matter

[crazy frog]

  another tip for cutting straight lines if youre useing those metal rulers is to stick wet and dry sandpaper to one side useing spray mount, no more slipping just as you get to the end of ya cut, last one i did has lasted for 3 years so far

[Splash 1]

I tried that, now I can't read the numbers