I am interested in hearing from folks who have carried watercolor paints in tubes in their carry-on bags. Since the tubes that I have are only 15 ml each, several could fit in my 3-1-1 bag, along with the usual liquids and gels. Has the TSA or European security staff questioned you about the watercolors as you passed through? Were you asked to provide a Safety Data Sheet from the manufacturer of the watercolor, addressing flammability? On the TSA website the only mention of any kind of paint that I can find is “Spray Paint,” along with a catchall category: “Flammable Paints.”
Thanks, Steve