While water filtration helps with water spotting, it still won't completely solve your main issue that your driveway gets a lot of sun.
Here are a few tricks I use:
If possible park your car in the garage or near a shaded area prior to you wanting to wash your car, helps lower the temperature of the paint. Therefore slowing the drying time of the water.
Position the car where at least 50% of it is shaded in some way. If you don't even have that, buy a large pop-up party tent ($100 at most). You can usually fit most vehicles under those or even use it add shade by positioning it next to your car. Rinse/wash section by section starting from the largest shaded section/side instead of hosing down the whole car. When I say section I mean dividing the car in 4 parts (driver/passenger/front/back).
Also no matter what I do my rims/tires/wheel wells first before I apply any water to the car's painted surfaces. People forget to utilize the slow normal flow of the hose water after they are done washing and rinsing the car w/a trigger sprayer or pressure washer. If it is properly protected, start from the top of the car with just the slow water stream working your way to the hook/trunk/sides. It will remove/sheet the water off the car easily. Then having your leaf blower already plugged in/hooked up and ready to go allows you to not waste even 5 mins, this is key when the water dries super fast. Lastly I use a quick detailer or some type of synthetic sealant spray to help aid drying the car b/c the panels get dry so quick. Starting from the side or sides that are in direct sunlight.
I use all these techniques even when it's completely shaded and never had an issue with water spotting or paint etching ever. I have owned/own Black colored vehicles for most my life.
I just think that too many people believe there is a magic product or device that will solve a huge problem, but it is the combination of a lot of stuff that doesn't require any money that can help.
thanks for the tips! Are you saying the vids of washing black cars in direct sunlight with cr spotless is a gimmic? :disapointed:
I’ve been into detailing for the past 15yrs also...full on paint prep and correction with DA and arsenal of pads etc...not just you’re wash/clay/wax that some will call full detailing :act-up:. Had black for the past 10yrs that I’ve meticulously maintained and already use all those tricks lol. Keeping the car wet, then taking off the nozzle to sheet the water off the car instead of spraying and leaving water beads... is what I find to work the best to avoid water spots. Still hard to do if there’s full sun...and have to work quickly. I can find areas shaded by some trees depending on the time of day..but have to keep inching the car up to stay fully shaded. At least Now with the Tesla, I can move it without getting into the car haha.
Will probably give the CR spotless a try and will post back after...if I do get it.