Hey blunted_nose I know what you mean, very calming productive past time.
Any way a buddy of mine had a sintered base a while back and took it to the shop when it got some large holes in it.
He said that unless he wanted to spend big bucks it would be cheaper to get a new board because of the cost of grinding it all the way down and then building it back up again.
Having said that I have know guys to p-tex their sintered boards with not too much hassle, not pretty mind, and the tendency to drop off mid ride is always a possibility.
Same for your edges, I think definitely possibly to fix them but its always hard to get the same level of quality from a repair job.
Looks like you may have to get your self an early Christmas present
Hope this helps,