This is perhaps the most exciting part when redecorating using vintage flea market as pieces which may appear a bit off with your personality may actually work in the end. Who knows, those rustic pieces found at shops will work just fine with your industrial-inspired space.
In the end, bear in mind that when decorating using vintage or flea-market finds, it is always important to let your personality show. After all, it's your space that you're working on.