First of all you have to understand #7 to be able to use it properly. It is not difficult to remove but at the same time it is - if you try it to remove it as you'd do with other stuff. Because it is a non-drying oil, it will always be slightly tacky. Do not attempt to remove it with one wipe as it will be a tiresome process.
It doesn't dry, but skins as a cooling pudding, so just remove the skin of it lightly. Much of the wiped layer will remain. Go around the car once again, remove even more. At the end, you have to around the car 2-3-4 times to remove it properly. Let is sit after complete removal, and after 30-60 minutes you can top it.
It is oil, so it will fill to a certain extent and it can make the overlaying caots of waxes a bit less slick. Don't worry it provides a unique look, and slickness will return with more wax layers. Old-school product with character, just you have to learn how to use it properly. It adds wetness and richness to the paint and excellent on single stages as mentioned.