It is possible to remove mistakes when using gold or lustres by using a ‘gold eraser'. It looks like a normal eraser but is chemically formulated to do the job as well as containing an abrasive.
Lustre resist is a product that is used for blocking out areas that you do not want to add lustre to. It fires away.
Areas of purple, blue or brown metallic coatings are caused by too light an application of the metallic overglaze.
The use of metallic overglazes and lustres add a great deal of beauty and value to a piece. It should be noted that a piece is even more beautiful with multiple applications with firings in –between.
Halo lustres and metallics can never be thinned since the solvents in these products must be present in exact proportions. Every effort must be made to insure little evaporation.
A coating of clear spray will help seal metallic colours and make them easier to antique
Cracked metal overglazes are caused by firing to an excessive temperature
If a piece removed from the kiln that has had gold applied has hair-line cracks, it has been over-fired.
If you want a multi-coloured effect in your mother-of-pearl lustre, it can be accomplished by firing your lustred piece with different coloured glazed pieces at the same time
When gold comes out of the kiln with purple spots it is usually caused by too thin an application of gold or too much thinner in the overglaze.
When working with lustres, all forms of contamination must be avoided. The work area and object must be free of dust dirt and moisture