I currently have the manifolds pulled off the 235 and have been soaking and scrubbing the parts with parts washer fluid, but there's still some build-up of crud plus some rust I wouldn't mind getting off before I paint them. I was thinking about stuffing the manifolds with paper towels, duct taping over all the mounting surfaces, blasting them, then soak and thoroughly cleaning the parts again to get any media out. Is there a better way to clean these parts or a reason I shouldn't do this?
