QOL For Mechanics Addition & Wax

So someone already suggest a QOL for mechanics so i will not repeat what he suggested but I do believe that the internals need to be reworked to not be so finicky and unreliable. Although in addition to that I think we can add a wax item mechanics sell that keeps your car clean for an entire wipe. Not a lot of people but wash kits since mechanics get it for free, and the constant need to wash your car (especially if you like your car clean) can be really annoying. A wax kit that we can sell them and they can apply would be really cool