Hi. Just had a new bathroom window sill installed (been waiting months for it), it's white plastic cut to shape and glued down. There's some residue on the surface, I think it's from the silicone used around the edges. Just really wanted to know if white spirit is safe to use on plastic sills or if it would make things worse? What else is safe to use on plastic for cleaning stuff off? Vinegar and bicarbonate of soda ok? You can see the darker residue marks along the surface in the photo (came out a bit dark).
http://i.imgur.com/WrTCfeC.jpg
http://i.imgur.com/WrTCfeC.jpg