If you feel an affinity, go for it, I'd say.
I have some ancient Armstrong tartan which I felt drawn to - it was some time after the purchase I recalled that my father had an engineer ancestor on the Wilson side who worked for Armstrong Sidderley - the car maker - and designed part of the engine, I think it was.
My dad was always thrilled to come across one of the cars, particularly the Sapphire model and I believe that it was his engineering connections which put him into factory work at Rolls Royce when he was first called up in WWII and then into RAF ground crew, so there is a strong allegiance to the name.
If you know what tartan it is and why you are wearing it, that should be good enough reason to do so.
Anne the Pleater
I presume to dictate to no man what he shall eat or drink or wherewithal he shall be clothed."
-- The Hon. Stuart Ruaidri Erskine, The Kilt & How to Wear It, 1901.
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