Fibreglass Tub Cleaning Home › Forums › Public Forums › General Plumbing › Fibreglass Tub Cleaning This topic has 1 reply, 2 voices, and was last updated 24 years, 8 months ago by Cathy. Viewing 1 reply thread Author Posts 12 Mar 2000 at 11:13 pm #272635 MasterPlumbersKeymaster I have a fiberglass tub that has had years of soap scum, hard water, and tannin build up. I think some ofthis has been waxed in. What can I do to deep clean and then re-wax or re-seal. 27 Mar 2000 at 9:40 pm #286053 CathyParticipant Cindy, try The Works available at Wal-Mart. Follow the directions. It worked great on my tub/shower. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In