It's not the consumers fault. The manufacturers of D.I.Y. Home improvement products such as paint will mislead the consumer by printing the words refinishing on the can. The truth is if that product even worked half as good as they say it does. I would gladly buy it by the case. However, the simple truth is it is pure junk. Even the word Epoxy is an overstatement. Epoxy is such old technology that It was used in 1991 when I first started tub work. We used it for Apartments. They wanted the tub painted and needed it to last 6 months, because that is a lease term. That was using the good strong Epoxy that mixed equal parts and dried in one hour. My question is How can a one part spray can be called epoxy? I mean we had to mix half paint to half hardner just before doing the job.
My point is that A professional re finisher will use synthetic porcelain, not epoxy. I can tell you that fusion finish will only use synthetic porcelain. I will etch the old surface so the molecular bonding agent called fusion lock chemically welds the new surface into, not on top of the old surface. Dallas Bathtub Refinishing, Dallas,Tx.