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<BR> Muriatic Acid is the best. If using it on Aluminum you should dillute
<BR>atleast 50% or it will dis-color badly. If on steel or iron, it works like
<BR>magic. That is, like others stated, if there is NO grease what so ever. You
<BR>can get it by the Gallon at almost any store with a pool section. It also
<BR>works great as a concrete cleaner. As you will find out if you spill any like
<BR>I did!! =) Cheap, something like $4 or less for TWO Gallons.
<BR>
<BR> Justin
<BR> '88 C4</FONT></HTML>