Not that last unless you get it professionally done, which can be costly. If it's an antique and a show piece it may be worth it, if not it may be wiser to rip it all out and expose what ugliness and rot is hiding underneath, budget before the rip
Re glazing an old porcelain tub
Stefan is likely most correct. You can look online through U Tube, but this is a tough assignment, and is a hard job.
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