Wondering if anyone can provide some advice on how best to repair this shower base, as I've never had this type of shower before. It looks like the previous owner just painted the base. I am looking at upgrading the shower next year, but for the time being I just want to clean up and stop any water damage - the white panel is starting to bubble.
Anyway I welcome any ideas or suggestions that anyone might have. I'd love to keep the cost minimal and something that is relatively easy to do. Thanks.

