Mk3 Cavalier Owners Club | Vauxhall Cavalier Dot Com

Hi I've got some new Vauxhall stickers off e bay to replace the worn Vauxhall badges in my turbo alloy caps , question is what the best way prep the sufrace to stick the new badges on? Does anyone know

Remove all old sealant and contaminants using a suitable solvent-based fluid, such as Autobrite Direct 'Just The Tonic' glue and tar remover