I've tried to raise this point several times before on other forums (fora?).
Obviously, if it's done for an individual's gain then they deserve to face the doorknobs, as it were.
But, if it's for preservation then fine....but....
Pof is
not the answer as eventually you can't climb on those holds without using it (see some of the old Font problems). If that state was reached, then people would probably just start using it everywhere.
The stuff that's been done at the Bridestones seems to work quite well, but doesn't look quite right. I've emailed Al Williams in the past (he's done some good repair work at Robin Hood's Stride) and he said that although it's possible to repair holds well, it's difficult to get a good colour match, is time consuming and expensive. It's a bit much to expect any individual to fund this themselves, so who should fund it?
Does it need something like the various "bolt funds" that exist to keep fixed gear in good nick? If that were the case then I'm sure many would quite happily contribute. I'd like to suggest the BMC should get involved but as I'm not a member that's none of my business.
Now that everywhere carries a heavier load due to the upsurge in bouldering, it's only going to get worse