Stains may be used on pieces that are going to be used outdoors. When finished, they should be sprayed with several coats of fixative to prevent moisture from penetrating. It is a good idea to have the inside glazed.
You can apply as many coats of sealer to stains as you wish, but you must be sure that each coat is dry before adding another.
Stains are used only on bisque ware.
Most translucent stains used are oil base colours but some manufacturers do produce waterbase translucents so be sure to check the labels to find out which you have
Remember that pieces decorated with stains are not safe for food, nor are they dishwasher safe.
Opaque stains are waterbase colours and should be thinned with water. All materials used in the application, etc., should be cleaned with water.
You should stir all colours well before applying except for a few. In setting on the shelf, many colours settle and stirring will help to mix them again.
Correct application of opaque stains requires the use of a stiff brush.. The bristles should be quite stiff so you can sort of scrub the colour into the bisque.
Before applying any sealer, be sure that the piece to be coated is free of any foreign debris, as it will become a part of your finished piece if allowed to remain.