Not a fan a trimming at all. Restoring/adding back to a book I'm ok with. Removing from books on purpose I don't like.
+1 (thumbs u
+2
+3 Maybe the most heinous "restoration" technique there is. More like disfigurement technique.
+4 It's not restoration because it doesn't bring a book back to any original state and shouldn't improve the grade since it removes a portion of the book. In some cases it apparently improved the appearance of silver age books that had overhangs (and since not all silver age books had overhangs, it can be logically consistent to say the apparent grade improved in those limited situations). But when kids cut comics to fi them in their notebooks or cut around the edges of those pin-up covers of Superman 1 and Batman 1, so they could put them in a frame, they were not "restoring" anything. Nothing can be both damage that affects the grade and at the same time also be restoration. At least, not logically.
+5 It is sickening to see, and it is a dishonest practice especially when sold as "unrestored"