塗装 is read as とそう (tosou) and means coating.
とそう
tosou
ぬる
to paint
とふ
application (of ointment, etc.)
とりょう
paints
ぬりかえる
to repaint
ぶそう
arms
ふくそう
attire
ほうそう
packing
いしょう
clothing
せいそう
full dress
ないそう
interior design
かいそう
remodelling
しんそう
redecoration