Finish TradesCâu 293 / 700
When applying a clear water-based polyurethane finish to interior wood floors, why is light sanding between coats recommended?
a.To promote adhesion of the next coat and knock down raised grain and dust nibs
b.To remove all the previous coat entirely
c.To change the wood species
d.To add color pigment to the floor
Giải thích
Light sanding (scuffing) between polyurethane coats improves mechanical adhesion of the next coat and removes raised grain, dust, and bubbles for a smooth build. It is not meant to strip the prior coat, and sanding does not change species or add pigment.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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