I would seriously like to see the Tar upgraded to having particles inside the cloud that have a chance of making projectiles explode unexpectedly before hitting your precious ship.
I read that as your trying to use tar to lose spots, which works if you have a ship with centre mounted weapons chasing you, but fails with ships that have side mounts like the junker, because they will always see around the cloud.
The thing with tar is not to think of it as a portable cloud, but rather as a large rear facing flamer which can disable your pursuer if they fly through it. Also if your pursuer is to one side turn in the opposite direction just after you release the tar and diving also helps if they are trying to fly over the tar, if you toggle it off and on you can make a 180 degree spiral and still have engines to move with.