The most efficient way, if we have not succeeding in
cleaning, as we mentioned in
the beginning, with water and detergent or ammonia
or bleach, is a solution of hydrogenperoxide and some drops of ammoniaand let it act.
Paint and inks:These spots are more complicated to deal with. Both are cleaned with solvents or removers of layers of paint: there are several types, the most common are methylene chloride or mineral alcohol. Take care with methylene chloride, it is dangerous.