Welcome to the Bunnings Workshop community. Thank you for joining us and sharing your question about your shower tray.
I suspect that the former owner of the house tried to paint the shower tray. It is not a recommended procedure as paint does not last long on shower trays. If you wish to change your shower tray assembly, you will have to engage the services of a registered plumber. The plumber will offer you choices on replacement and repair. You can then shop around for the best deal on shower accessories for your shower renovation. Please keep us updated, we look forward to seeing your shower repaired.