Best car wash method to avoid swirl marks

Two bucket method is the way to go. Foam cannon pre-wash, then hand wash with a microfiber mitt. Never use automatic car washes on dark paint.

The key is the two-bucket method with grit guards. One bucket for soapy water, one for rinsing the mitt. Always use a microfiber wash mitt, never a sponge. Pre-wash with a foam cannon to remove loose dirt first. And never wash in direct sunlight - the soap dries too fast and leaves water spots. For drying, use a quality microfiber drying towel or a filtered air blower.