I'd be interested in the Waxoyl recipe. I have a power washer and will clean the car myself then. This might be an old wives tale, but I've heard the water used in most car washes goes through at least a little recycling, i.e. might have salt in it. That could well be bogus. Most of the automatic type car washes either close down or are super crowded when they do open. I don't see where I'd have a problem keeping the car pretty clean during the winter then. I'm going to see what I can find for spray on wax, that should help a bit. I might be able to buy a lift in the spring and that'd go a long way to being able to react quickly to underside issues. I do need to rust-paint the part way under the car in front under the bumper. A good coating of POR15 should protect that from any further damage, only has a light coating of rust now.

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1985 300D 197K - Semi-Daily Driver Diesel
1998 Volvo V70 AWD 226K - Daily Driver 2
1998 Volvo S70 140K - Wife's DD
2003 GMC Sonoma ZR2 Option - Rusty Truck
THE BABY 1958 220S Sedan 66K All original, never restored and never will be.