I think I will be using automotive touchup.com to color match my half doors, someone here pointed them out recently. I figure even if it is not perfect it will look better than mismatched doors I have now. I am trying to decide between their pre-mixed aerosol and pre-mixed ready to spray. I do have access to a paint both so dust contamination should not be a concern. I don't have a spray gun but see some pretty cheap at harbor freight etc. Even with the cost of buying the spray gun the cost difference is insignificant to me, I just want the best results. So, aerosol or paint gun?