ApplicationCâu 60 / 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
Giải thích
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.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Why is maintaining a 'wet edge' important when brushing or rolling large walls?
- When rolling a wall, what technique helps achieve even coverage and hide roller marks?
- How many coats does a typical high-quality paint job over a properly primed surface usually require?
- What is the purpose of masking and using drop cloths before spraying?
- High relative humidity during application of latex paint tends to do what?
- What is the correct spray technique for keeping film thickness uniform?
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