I should imagine it’s a satisfying experience to recondition an old plane. But I don’t think it’s as easy as people make out. For one , you’d need a perfectly flat surface to sand on. Otherwise what’s the point?! Too much is made of reconditioning planes. Add in your time , the cost of a new blade , potential for error and you might as well buy a decent new plane and crack on with doing what matters …. Woodworking. Just my penny’s worth
Aye, you can achieve this even with an out of whack plane, should you follow David Charlesworth's videos. (stopped shavings, and his definition of a straight edge)
You can pair timbers together and double an error, which one can go finer and finer
doubling it beyond vision, until it's within tolerance for a plate to sit on, should you not have a surface already.
Another method I find useful when checking a plate resting on something flat is
having two engineers squares, butting the blades back to back, and pushing them along the surface with good lighting behind, checking for light showing between.
(angle poise lamps, good value "Territal" ones in the Sweedish furniture store for a tenner)
Should you be observant, then the surface doesn't need be a Starret (R) granite plate
"Observant" as in using Charlesworth's lessons of hinging/pivoting the work
Same principals apply, and that will find an error regardless of the accuracy of the plate, if you move it about to check if the same thing is happening where you
might suspect the opposite, you know where you stand.
You could even use melamine, provided it's not damp and adequately supported.
Observation trumping any spec of any plate.
You need a surface to check with, along as what to use for lapping,
otherwise you would likely get into bother, should you follow many videos to a tee.
Keep checking, remember Charlesworth's tips and you will be thinking clearly.
You likely would get a tonne of mileage from your plane,
should you decide to ignore flattening.
Finally worth noting that anyone who's getting
straight shavings from a Bailey plane.....
likely doesn't have some premium magic steel in the tool!
That says a lot about it really,
should you wish to seek out the evidence for yourself.
All the best
Tom