Surface PreparationCâu 3 / 100
When patching a small nail hole in interior drywall, which sequence is correct?
a.Fill with spackle, let dry, sand smooth, then spot-prime
b.Prime the hole, then fill with spackle and leave unsanded
c.Paint the hole first, then fill with caulk
d.Sand the wall, then apply finish coat directly into the hole
Giải thích
Lightweight spackle is pressed into the hole, allowed to dry, then sanded flush with the surface. Spot-priming the patch seals the porous filler so the finish coat dries to a uniform sheen. Skipping the primer often causes 'flashing,' where the patch shows through as a dull spot.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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