In reading the site, I noticed that raising the car for winter storage requires placing stands under the suspension. What if they are placed under the frame on the front and rear axle in the back? Will this hurt the car?

Also, I am told that pumping up the tires for winter storage to 60 psi is what most people do. Can anyone confirm this?

Sorry, I have a nice car but I am not mechanically inclined. Any assistance would be helpful.

Looking for a storage bag that seals the car. Any suggestions?