Once the paper is dry, the mask can be removed by lifting it away using a rubber cement pickup. Fine details can be achieved using this technique, however, the masking fluid will destroy the brushed that is used in it so be sure to use an old or cheep brush. It is said that rubber cement can also be used for this purpose but fine detail is difficult to achieve due to the nature of the flow of the glue. Creating textures in watercolor can be a lot of fun and not too difficult to achieve. There are many common household tools that can be employed for these techniques.
Cling wrap produces a very intense effect.
To create this effect, place the cling wrap on a wet wash and leave to dry. Salt is another common household product that produces texture. As with the cling wrap, simply sprinkle the salt onto the wash of color while it is still wet. The salt will pull some of the color to it and pool around at the same time repelling the rest away. For those painters who like landscapes, wax can be an invaluable tool.