Originally posted by HazyMyst:

Yeah, i get it. It's not like I'll rage quit. I LOVE this game I just hate the rebuilding, even tho I find it relaxing. So yes I have a ton of mats, I love to grind..... I heard that spawned mat will de-spawn eventually, besides i like to earn stuff.

I've not encountered it but to be safe you can always build something the demolish or use stacking (like stone etc) and demolish otherwise which should launder the item codes to a non spawned iteration perhaps. Something worth testing maybe.