When I lodged with my Aunt and Uncle, I asked to use Uncle's spanners. "Fine, but make sure to put them back in their proper places." Which of course, I did.
Next week end my request was refused. "Why?, I put everything back." "Yes but it was dirty."
Since then if I have to borrow, I return the item(s) meticulously cleaned.
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On a construction site in Shetland, many years ago, our oilskins were for ever getting nicked. My mate solved it - across the shoulders he wrote "Stolen from (his name)" I often do the same even now, for "portable" stuff - few people want to brand themselves a thief.
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Always weld your name on sledgehammers!
Geoff