Is it a sin to modify an antique cast iron griddle?

I picked up a few pieces a while back and after they sat around for about a year I finally got to working on them this past summer. I had to use a Sadie pad on my drill and take them down to bare metal and reseason them from scratch. They’re just lodge brand nothing special but one of them is a 14” Dutch oven that new is close to $100, and I gave only $20 for all 3 pieces.