He is wearing plastic gloves to protect himself from the toxic chemicals in the paint; some painters prefer the old, poisonous solvents and pigments to the new healthier materials.
3
如果没有人帮你打扫猫厕,那么自己做时一定要带塑胶手套,在结束以后要彻底清洁双手。
If you don't have help to keep the litter box clean, wear rubber gloves when changing the litter and thoroughly wash your hands afterwards.