like you said earlier, if any oil stains, get the Astonish engine degreaser. otherwise petrol pump set rs 10 wala shampoo saache. a couple of tooth brushes(stiff and soft),an old mf. I used the formula 1 interior protector for dressing the plastics and wires(that was done by the scotch brite ka chota wala sponge cut in half) .No direct water spray water was used in the process. scrub the area with the shampoo, and lift it off with damp to slightly wet microfiber(keep a bucket to wringe and rinse the mf) . oh and bandages., lots and lots of bandages. guaranteed bruises and cuts. since cultuses have crowded engine bays get a paint wala soft brush maybe?