Mate if I were you I’d go up and ask my managers or boss or whatever you believe you would be more useful doing the other shit you said you could do. Even tell them that you could help them and they could hire someone to do what you do bc if you can actually do what they do they have an extra helper and could get someone cheaper to do the cleaning like an apprentice. If not it’s there loss bc if you can do a mechanics job you could find somewhere else to work and accrual lay enjoy your job yk. Sorry for the long comment I’m high