i have used SG for awhile, and it works pretty good, cant stand the smell though. i only used it for the engine compartment/front end components on my truck.
however what i recently picked up was a bottle of orange blast, and man is that stuff awesome. ive had mud caked on my front knuckles from offroading for probably over and year, and it was honestly just part of the knuckle at that point, it just looked like it was a bit dusty on the surface. i hit those real quick with the OB last night to see what it would do, and who woulda thought my knuckles were actually black, haha. i did a real quick pass just to see how it would work, but im gonna go back next week and really get in there. with a mild brush and then following up with a standard bucket wash, i think the front susp. will look good as new