These ceramic tablets are in a bad state, but at lest they are dry. However, the problem is, just by brushing them to clean them, may rub of some of the details off. Also, there is growth greens to clean up. Because the tables are only bisque fired and very porous, cleaning becomes quite a task.
This is going to be a weekly update, if anything it will help me eventually finish the job so to speak. It is not usual my way of doing things, but there is always an exception. The main reasons are priorities and time.
This is a new phase, and learning on the job. These ceramic tablets, as there are visual images to communicate with outer space, a la Mariner space program, but not the Ten Commandments. The state of many is very poor, as they have been in a water-logged condition.
Most of the time, the best solution is to let them dry, and then they could be handled. As the example above they just disintegrate, not a healthy prospect as they might end up on your foot.