Watercolors, acrylics, pigments and most artist oil paints
Quantity limits: None*
Artist paints that are nonflammable are not regulated by FAA and may be carried in carry-on* or checked baggage.
For transportation purposes, "nonflammable" paints are those with a flashpoint above 140° F / 60° C. The flashpoint is listed on a product's material safety data sheet (MSDS). Section 14 of the MSDS will also indicate if the product is regulated for transportation. The MSDS is usually available online from the vendor or manufacturer.
Some artist paints such as alkyl gels, polyurethanes, and varnishes can be flammable (flashpoint at or below 140° F / 60° C). Flammable paint products may not be carried in carry-on or checked baggage.
Paint thinners, turpentine, and brush cleaners are flammable liquids and may not be carried in carry-on or checked baggage.
Aerosols paint products use a flammable propellant and may not be carried in carry-on or checked baggage.
*Liquids, pastes, and gels in carry-on baggage are further limited to 100-ml (3.4 oz) containers at the TSA security checkpoint.