Since we're talking about aluminum "polishing", I thought I'd mention this in case it's happening to anyone else.
I used to notice stains coming from the edges of the cowling around the nose bowl, trailing back in a slipstream pattern. It reminded me of oil stains or exhaust stains, but they were dark grey and kind of powder-like. Also, they came from the side of the cowl, not the bottom. It turned out that it was aluminum powder, caused by the vibration and wear between the cowl and the nose bowl. The aluminum was getting pretty thin where it was happening. It was starting to happen where some baffling was, too, except that it wasn't noticable unless I looked at the inside where the pieces met. I got some friction tape and put it on the inside edges, and it stopped it. If I had just kept washing it off, the sheet aluminum would have been pretty thin after awhile. I think this must be the cause of some of the holes I see in cowlings occasionally. ------------------------------------------------- Steve Dold [EMAIL PROTECTED] Say NO to useless over-quoting -------------------------------------------------
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