We have to take some nice photos of a car. Everything is powdercoated a chrome silver and the intake manifold is filthy in comparison. I suggested a ceramic paint job and Corky said it was too much work. Any ideas?
It has a very strong odor when using it, so do it in a well ventilated area. I'd lightly scrub to prevent too much from getting on things. You can also dillute it with water and it will work almost as well as full strength. Chemical or acid resistant brush, I think I've used parts washer brushes, the ones with thick black strands.
Easy Off oven cleaner also works extremely well. Low odor version is nice.
Sorry, I wasn't really recommending muriatic acid. It will work as a dilute wash but it isn't really safe in any way. It might damage things like powdercoat and whatnot.
If you want to clean it up just get some of that Gunk engine wash, that stuff works great for cleaning aluminum and grease. Probably the same thing as easy off oven cleaner, they're all acids I guess.
I used an 'aluminum' spray paint. It's grey with a little flake in it, and makes the surface a little rough. I can find out the brand if you really want but I'm sure there's a few out there. Cleaned off the big dirty stuff with brake cleaner and put a few coats on. Seems obvious but no one mentioned it. My manifold in this pic was filthy and I just sprayed 2 coats. Looks good in this pic, looked even better when it was first done.