It wouldn’t be necessary to add a new item at all. The materials can be number gauged and as such a scale of quality by simply adding such a system.
Items with qaulity needs, Metal, leather, food items for a few examples.
Metal would be 0-10 Scrap to high quality.
Leather 1-3; light, medium and hard. Each being able to upgrade and craft differently.
Food is already measured in days and how much a mid range before turn to spoil.
Motor vehicles oft have the under carriage containing really good steel that I know for a fact many new england hobby smiths go to junk yards for their scrap.