For inside corners, the long point of the miter is always at the back of the molding, against the wall, and against the miter saw fence. For inside corners, you measure to the long point of the miter and you cut to the long point of the miter.
Liquids. If you have liquid or gel personal beauty items or food products, pack them in your checked baggage. Space in your carry-on should only be reserved for 3-oz. bottles of liquids or gels. There is no size restriction on nonflammable liquids and gels that fit in your checked luggage.
You can carry in your checked in luggage but not in ur hand baggage. But airlines always have the last say. And even if u r carrying make sure you pack/wrap it in a plastic cover or a zip lock bag. Due to pressure sometimes it might leak! I personally have carried spray and all in my checked in luggage.