Oxalic acid - rubber-gloves of the type worn for dish-washing. Safety-glasses. Wear old clothes and remove same afterwards.

Acetic acid - 100% - will burn the p*** out of you. As it's a liquid (which freezes into crystals at 62F - which is why it's called "glacial" acetic acid). Gloves, good safety-glasses. Rubber apron.

This is standard laboratory safety protocol. And it's there for a reason.