Spray? Hmmm. We could have quite a discussion about 'spray' but lets say I generally prefer something that may have a little good old short-arc in there. Look at spray arc aluminum under the microscope and one sees aluminum foam. Short arc bigger bubbles and more berries but I'm not sure one is better over the other strength wise. Not arguing here but more to the point of the way I do it and what works for me. The point is 'spray' has no magic for me. One does not repair a canoe with mig by 'spraying', for example.