I dont have a belt grinder either
I own a belt grinder adn if I have to do it either on a stone or sand paper,
1) I would do it with either a 200 or 400 grit stone if I expect fast results.
2) Top priority is to shape it the way I want with a scraping motion say at least 60 degrees. Check regularly. A sweepingt motion wld be required for the curve I suppose.
3) do bear in mind that the front portion is thinner than towards the rear and pressure has to be adjusted..
4) once it it has been shaped, I wld thin the edge with stone to the knife abrading. Any strokes that will remove metal. Wld do this with the appropriate grit depending on how much steel needs to be removed .
5) the sharpening process now begins...
5) Then the regular sharpening method.
IF no courser stones.. even on a 1000 grit stone.. eventualy you will shape it say within a week with a few minutes each time. Exert pressure.. LEan on it ( if necessary, )but not too much. for example.. regular pressure is level 5, just the weight of knife + hand is level 1.. For serious removal.. say level 10.
IF no further improvement or you give up.. then send it out to teh pro... AT the very least... it sort of build up your experience in shaping the new profile..
Have fun adn a nice week-end..
RGds
d