Cracking on surface of oil painting. Is there any other way to salvage an oil painting?
As far as I know, in restoration craquelure will often be 'fixed' by concealing it.
After applying a layer of varnish to facilitate the removal of retouches like these, the cracks will simply be painted over with corresponding colours.

Of course, this is usually done with older paintings, that no longer heavily react to both inherent and external factors, but even if the craquelure shows up again, using this procedure the retouches can be removed and the process repeated.