A bottle of acetone from the chemist (around a pound) or steal some nailpolish remover from the cupboard,its the same as the spray from Maplin.
Unless Maplins have totally changed their formulation recently then their label remover, nor anyone else's commonly available in the UK such as that from Lakeland, Electrolube, Servisol, RS, Farnell, CPC etc has
any Acetone component, nor do they contain Ethyl acetate which is now more commonly used as nail varnish remover.
Terpenes, (commonly Limonene) and petroleum distillates are the major active components of 'label removers'