Agreed. Good textiles, I don't believe they exist anymore. Like they just burned the factory down or something. When I was starting out in the trades, I'd buy all my pants from thrift stores. Grease, oil, general dirt, etc, not only did the old denim last longer than anything i bought new, it washed way better. My stained clothes would actually be like 80-90% stain free out of the wash. The new stuff after a day of work became permanent work pants they just never washed out.
Come to think of it, it is probably all the damn synthetic fiber the add now that binds tightly to the petroleum molecules. Unlike the fully natural stuff in the past that can actually release the stain.
Meh only ruin it at like the weld area. Besides lawn mower blades aren't that hard anyways. And a lick of a grinder will sharpen them