YOU SAID:

that stuff coated an arm and a leg

INTO JAPANESE

その物が腕と足を覆った

BACK INTO ENGLISH

the thing covered my arms and legs

INTO JAPANESE

その物が私の腕と足を覆いました

BACK INTO ENGLISH

The object covered my arms and legs

INTO JAPANESE

物体が私の腕と足を覆いました

BACK INTO ENGLISH

Objects covered my arms and legs

INTO JAPANESE

物が腕と足を覆いました

BACK INTO ENGLISH

objects covered my arms and legs

INTO JAPANESE

物が私の腕と足を覆いました

BACK INTO ENGLISH

objects covered my arms and legs