Yea, id somewhat insignificant. But on a scientific equivalent to 5% of 180 degrees. That would be 9 degrees cooler at operating temperatures. Or there about. Wouldn't hurt to spay it. Every litta bit counts. On the other hand, i did not paint the aluminum i ended up putting in my truck. Was kinda in a rush, at the time, maybe i should've.

Thanks for the insight, much appreciated.