I would lke to find a clear powder that adds only gloss to machined (sanded) aluminum. I find that the clear and alloy combination always ends up darkening somewhat, more on some alloys than others. I have used the EW standard and low temp clears, and a Protech polyester clear, and found very little difference. Applying a thinner coat helps a little, but not very much. Is there a clear powder that works well on aluminum?