How does one sand and refinish a tub?

Mine or rather my landlord’s looks bloody awful.

It is of course not a plastic shield nor is it porcelin. I am wondering if this is a project a novice could endeavor or what sort of tools are involved etc. I would need to sand first because aside from looking very shabby it still is largely covered.

Oh and I did ask my landlord if he would be willing to do it and he said he would when it didn’t require sanding. Which I am certain is ridiculous also he is the self proclaimed handy man of the building and as stipulated in the lease he charges 50 an hour plus parts.

Judging by his caulking job on the tub premovein where he simply recaulked over the old creating a massive inch seal on either side. Well he is learning.

Any heartening, educational or funny stories are also welcome.