ApplicationPregunta 60 de 100
Why should you 'back-brush' or 'back-roll' paint that was sprayed onto rough or porous exterior surfaces?
a.To add gloss
b.To work the coating into the surface for better adhesion and to fill voids
c.To remove all the paint
d.To increase overspray
Explicación
Spraying deposits paint on the surface but may bridge over pores and crevices without wetting them; back-brushing or back-rolling forces the coating into the substrate. This improves adhesion and fills pinholes on stucco, wood, and masonry. It is a common spec requirement on first coats over porous exteriors.
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