I finally finished* rebuilding my fathers vintage Peugeot bike. After a month of taking apart, polishing and slowly rebuilding I took the bike out for a first longer testride today.
Conclusion: I love it! It feels special to ride a bike you have taken apart completely, a bike of which you know every single piece you reassembled.
Thank you to everyone on the Classic & Vintage forum for all the help/tips I received during the rebuild!
(*Still needs some handlebar tape and some bolt tightening, noticed some loose bolts after the testride)