Porcelain tub refinish - POR-15, Whitecote

Have you had any experience with POR-15's Whitecote product in repairing and refinishing a cast iron sink or tub?

I have had great success with POR-15 in rust restoration on my car and do not have great confidence in tub refinishing companies given the critical requirements of preparation.

Whitecote never came up surfing "tub refinishing" but given my success with POR-15 I contacted them to see if POR-15 could be used and found out they have Whitecote for refinishing porcelain.

I am not finding many reviews or postings by users and really would like that bit of confirmation.

Have you had a failure in using Whitecote that is not attributable to a know shortcut in preparation and application? The worst my expectations are now is the difficulty of working in a dust free environment to get a good smooth finish.

Report on application:
WhiteCote renamed to "2k Urethane".

I did exhaustive study into prep and conditions for application.
Numerous calls to POR-15 for specifics and clarifications.

FAIL:
- Cannot put on fast enough to maintain a wet edge and thin enough that it does not run.
- Dry edges pill up and put debris in the finish.
- Estimate working time to be less than 30 minutes.
- May work if sprayed. May work on smaller fixtures than a tub. May work in a laboratory controlled environment, whatever that may be. I applied in approx. 73 degrees and 50% humidity.

- Did not work on a tub.
- Major fail. Major rework required
- Recommendation for Citrus Strip for coating removal.

Report on 2nd successful application done in 2020 and finish is still strong:
----STUDY THE HOW-TO AND MATERIALS BECAUSE IT MATTERS.

Total Boat Products
- Primer: TotalBoat; Total Protectedge, high gloss two-part epoxy; 'White'
- TotalBoat; Wet Edge, high gloss one-part polyurethane; 'White' - Finish

The existing tub finish was etched with LYSOL 10x (It will eat the porcelain enamel so calculate durations) and 220 grit sand paper.
I believe that stripping the caulk and pulling the drain execution and overflow are important to allow the finish to not have exposed edges. I do not know it from experience ... only from seeing the fail on quick and dirty tub refinishing projects.
- Don't let paint flow down into the drain - I had an access panel that allowed access under the tub.

Applied multiple coats of primer and learned the idea the cast iron tub is flat is erroneous. Use a sponge and green scouring pad to sand between coats so that the low spots are scuffed.

Applied multiple coats of finish.

I did not add any grit for slip resistance and do not find the urethane surface slippery.

These product are made for use in good weather, in the boat yard. Temperatures at time of application matter. Drying time indoors is days longer and in my case was in a bathroom with a window. Ventilation is important. Safety equipment is important.

These are the what and some how. The how-to was much more involved. It was a restoration Project not a paint job.

----DO NOT CLEAN REFINISHED TUB WITH ABRASIVES OR ROUGH CLOTH.
- Use 30% vinegar and T-shirt type cloth.
----Keep all hard objects that can fall into tub out.
- I had a hard plastic nail brush that dropped into the tub and the sharp corner cut a divot. It did not compromise the compound finish.