You can definitely soak pieces in SuperClean. I use it, too, and I use glass jars of different sizes as baths to soak pieces and remove paint.

It will also strip chrome from chromed sprues, if you want to.  That was my first use for SC-I stripped the chrome from the chromed sprues in the old Monogram Tom Daniel Red Baron Hot Rod.  I realized that I was going to have to clean up seams and sprue gates.  That couldn't be done without damaging the chrome, so I stripped it then proceeded as usual on a build.  I used Rustoleum's Bright Chrome to paint those parts, and it turned out looking more realistic than the original chrome from Monogram.