Jars can stay uncovered and available for you to paint any time you want. You can experiment with combinations to see if you get the desired results. You can also use a solvent such as mineral spirits or turpentine for thinning purposes, but do not use traditional oil painting mediums such as linseed oil. Just remove excess quantities of paint with a palette knife or spatula, then use a window cleaner and soft cloth to wipe the glass palette clean. To clean, soap and warm water can be used.
Some artists prefer rubbing alcohol or a solvent such as mineral spirits to clean.
If you would like further information or a Material Safety Data Sheet, call, write or fax to the address below.