Slipone,
Asdf answered most of it, but another way is to put your shit into your suitcase, in your luggage that you give away, not your hand luggage. If you have any ink/paint in a bottle that has a somekind of sticker on it, just remove it so it won't be simply identified. It should be okay so. I bought four bottles of Grog for my friends when in Germany, took the stickers off, put it between my clothes in my suitcase and there was no problem.
Ofcourse think about it too, most stuff forbidden on planes are mainly for security: ink and other stuff like that MAY ignite and your plane may crash. Don't take too much stuff with yourself :).
Making myself a fool again.