Advice from my detailer was do not use coin wash or automatic washes/soaps to keep the ceramic coating intact. It's supposed to last 3? years if you maintain it.
I tried a foam sprayer with Chemical Brothers Ceramic foam, worked well..but washing it off as a PITA as I do not have access to a water line, as I previously said.
So I decided to go with a waterless AMMONYC products.
The best anti-salt hoseless wash solution Nothing worse than a dirty car and no way to clean it safely. If you live in an apartment with no access to a hose, an oceanside/coastal environment, or deal with harsh salt-heavy winters where your hose is wrapped up for the cold months, the Anti-Salt...
ammonyc.com
and another product for non winter washes.
Spray on and wipe off. Then a lubricant to protect the drying wipe down.