Sticking to the theme of maintaining a watercolor/travel palette, I created the video above. The watercolor box you will see in the video was originally a Cotman Watercolor Compact Set set, that I reclaimed, replacing their palette with colors I know and love.
Cotman is Winsor Newtons’s student grade paint set. Empty travel palettes can be quite pricey, so purchasing a student grade set can be a good entry level start to maintaining your own groupings of color, and the paints in them are decent, so you might choose to stick with these paints while you journey into painting with watercolor. Once those paints are used, you can begin purchasing tubes of paint to refill your half pans or pans, or, like me, you might purchase a cheapo palette of student grade paints and replace each half pan with professional grade watercolor paints that you already know and love.
To remove the student grade paint, I took each half pan, dipped it in water for just a moment and allowed the cake to soften some. When the cake appeared softer, I dug down into the side of the cake, between the plastic and the cake and pried the pigment cake out. I set those cakes aside and allowed them to dry (I just gave them to a budding young artist). Once I cleaned each half pan, I refilled them with my favorite M. Graham watercolor paints from tubes.