Re: 30 in deck just pushes grass over
Maybe "Better than nothing", but if it were mine ( and I hate to throw anything away ), I would invest in a new blade. I'm not rolling in excess cash, but I would cough-up the $40 for a new brush-blade from Richard's, if it were me...
If I were dead-set on using this one, I would take an angle-grinder and work on making the beveled cutting edges parallel with the length of the blade again, then maybe tapering out of that hard cut-back towards the center of the blade.
Would take an hour or two, and maybe a couple grinding wheels.
Time and supplies cost money too.
Also, the heavy brush-blade is not the best grass-cutter; better for brush-hogging.
Think about it and do what makes sense for you...