Two paintings I recall (of about 60 or so I've painted in two years) were, at one stage in their development, what I call 'disasters' and 'unrecoverable' - the more I did, the worse they got.I had to stand back and leave them A LOT, have sleepless nights, and fight like crazy to keep going with them. When I finally 'made good' with them and they were 'finished' I hated them - because they reminded me of all the angst I went through to create them. But one is my best seller in cards, and the other I sold after 1 week of being displayed in an exhibition (thank God - if it had come home again I don't know what would have happened to it - even though it was one of my favourites).
So maybe it is worth it to attempt to recover what I as the artist deemed a failure at one stage (though I did paint over about a further four works - but these were ones that I just didn't like what I ended up with - not the ones I spent hours and hours and hours battling with to get how I wanted them).
As a result of the above, when I find myself there again with a painting, I do tend to keep trying to get it 'right' (in my head) rather than give it up completely - even if I only touch it once a week. Especially since selling that last one that I pulled out my hair on.