What are the advantages and disadvantages of applying coatings by brush, roller and spray?
Brush application allows the coating to be worked in to the surface. This will ensure an adequate bond, particularly if the surface is less than ideally clean and smooth. Brush application is the most time consuming method and will often result in visible brush marks. Rollers are faster than brushes and still allow a measure of mechanical assistance in adhesion to the surface. Rollers also eliminate brush marks but may still leave a textured surface. Applicators should be aware that rollers will lower the natural rate of coverage below that which is recommended. Spray application is the fastest method of coatings application and generally leaves the smoothest surface. Total lack of mechanical assistance in adhesion, difficulty in assessing coverage rates and the danger of over-spray limit the suitability spray applications.
