If you happen to have a 6 inch or 12 inch strip of spring steel (the blue
"shim stock" commonly sold) , try hammering the oiled surface on an oiled
anvil (ie a hard faced, ringing anvil, not the  dull thuds from the dollar
store  ones) you can watch this process work.  A straight  strip of spring
steel will turn into a C shape, convex up, as you gently hammer it.  It
does work- try it. The hammer seems to stretch the surface of the far side
(ie the down side) of the spring steel, so it will curve upwards.
Now you have to think in three dimensions though to work out how to undo
what was done to the saw in the first place.
Cheers
Claudio