I haven't seen your link yet so I will not comment more than to say in PPSA they speak only of the ability of contractors and mechanics to place liens for improving the value of a home or a car.
Printed copy · Anthology Volume 1, page 615Printed copy from The Tender For Law Anthology, Volume 1, page 615 (printed 14 June 2014). Added by this site; not part of the Facebook export.