Trying to make the body rusted in Substance Painter

Trying to make the body rusted in Substance Painter
Study for the operation of the tool: the tool is said to be very marketable so I am now straggling to get familiar with it
試しに錆び錆び攻撃：このソフトの操作に慣れていないとヤバいっぽいので（Substance Painter）