the yellow machine in the last post is the steam machine, it cleans using steam using various nozzles, no water is sprayed and it instantly evaporates plus is hygienic, if you don't have steam machine you can use degreaser and use water from a spray bottle to rinse the degreaser thoroughly, just don't use running water then you'll be fine no need to cover parts, if you use anything other than this than be sure to cover sensitive areas with plastic bag then work, if you cover up areas then you won't need to go such elaborate lengths, lol i have seen people use running water on engines of bentley continental in usa, swift should be fine