I'll second the vote for the purple stuff! A couple of cautions though,
Don't let it sit undiluted on polished aluminum or you'll be polishing it again...
If it's undiluted you might want to wear gloves, it takes the oils out of your hands that lotions won't help until that layer(s) of skin come off, on the up side, it only takes a couple days.....
Steel will rust after you clean with this stuff, so after you spent the time getting everything so nicely degunked, think about a little WD40 on things that might turn orange.....
Yes, these are all personal experiences
Dave
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