Autoglyms rubber and vinyl treatment is tremendous stuff- makes all your placcy bits look like new and lasts for ages, Ive used it on dashboards, interior placcy trim, exterior placcy trim, tyres, engine bays. Always cleans and removes polish off the ectrior placcy trim if you have been a bit 'sloppy' when polishing. Highly reccomended
Will sort out your hardtop easy.