Coin op car washes (Pro wash here in Australia is my choice) are safer than hand washing if you use the 1000 psi warm soap and an RO rinse
Unfortunately other coin op car washes dont have the warm soap (just cold and the water recycling is not as good). the soap can be crap at some places)
However as soon as the brush comes out, the above statement is BS
I've stopped hand washing cause there is more lubrication in pro washes car wash product than a wash mitt can hold and your gliding the soap/water along the paint and not straight at it
No loss of shine, I don't lose any slickness and I have an undercover bay to dry the car in
I'm currently using the Glare system on the car and the added abrasion resistance from Glare Zero and then the protection from Micro and 3 x pro polish means I don't get swirls from that coin op wash
Only trouble is that zero is $208 a bottle retail, fortunately I get a 25% discount