» Residue of sanding water in corners,edges, crevices, or below decorative strips
» Ambient humidity too high
» Improper surface cleaning or preparation wrong thinner or reducer- moisture or air can be trapped in the film
» Excessive film thickness. insufficient drying time between coats or too heavy application of the undercoats
may trap solvents which escape later and blister the color coat.
» Contamination of compressed air lines.oil, water or dirt in lines
» When wet sanding polyester and applying topcoat without enough time for the water to evaporate.
» Incompatibility of materials

» Always remove exterior trim
» Clean substrate carefully. Blow and dry carefully
» Thoroughly clean areas to be painted before sanding. Be sure surface is completely dry before applying undercoats or topcoats.
» Don’t touch a cleaned area as the oils in
your hands will contaminate the surface
» Select the thinner or reducer most
suitable for shop conditions
» Allow proper drying time for undercoats
and topcoats. Ensure each coat flash
before applying the next.
» Drain and clean air pressure regulator and compressor tank daily to remove trapped moisture and dirt

» If damage is extensive and severe,paint must be removed down to undercoat or metal, then refinish.