I have a suggestion since this mod is mainly focused on engines and such how about Rust (rust) it would work like that element found in almost every mod virus except the color would be a bit chocolate brown with dark brown spots but it only effects metl and such not every element and then there's gonna have to be an element which can remove rust hmmmmmmm........
Ok. I'm going to pretty much start from scratch and not copy elements across until I can haz sorted everything out. I will start work when the next version of TPT is released.