The only way you can keep antiques like this original is to never operate them. Steam engines need flues, new grates, new staybolts, new flue sheets, new crown sheets, effective brakes, and on and on. I am glad to see old machinery restored and running for new generations to learn from and enjoy. Tastes change. Back in the 1960s the gas engine hobby was just taking off and restorers mostly wanted their vintage engines to look like new. Lots of original paint and patina were stripped off for new paint. That changed, and now most want the barn fresh, dull paint, old grease, and rust look. Don't fret over how original the machines are. Just be thankful that dedicated hobbyists spent the time, effort and money to make these treasure run again.
