Flatting a No. 8 hand plane
Just got ahold of an old Stanley No. 8. Was looking into how to get it up to shape and I'm not sure what to do about flatting the sole. I know most situations can use a sheet of glass or a granite slab. But with the sole being 24 inches long, and the world on lockdown because of COVID I was wondering if anyone has any other easy to find flat surface solutions out there? I hear that a No. 8 doesn't have to be SUPER flat so I was thinking possibly a length of shelf melamine might be useable, but im afraid of there being any bend in it.
Thoughts?