Rust Spots on Asphalt Driveway

My brother- in- law has operated a sealing coating company for 30 years. The best thing to do is remove the rust stains with a commercial rust remover. If they are not huge vinegar will also work. Again if not huge you can also make a paste from baking soda and water. Put it on the stains for about 15 minutes to draw out and neutralize the rust. If you want to try and cover it up get a bucket of sealer and put several coats on the rust before the entire drive is sealcoated.