Here's my two cent's Felix, I would always think an unrestored bow that is Mint would normally hold it's value better than a restored bow being exactly of the same year,model weight etc... But in the case of a collectable bow that is distressed a facelift would add value IMO.
Then again I took a very collectable 59 Kodiak and having Doc restore it and bring it back up to new, with tip replaced and a new finish because I plan on shooting it regularly. If one of the paper tips were to give way while shooting the bow would have it could spell disaster. It will be ready for another 50 years we he is finished. Chris