What type of Grease/ Lube do i use for a WELL L96 AWP Spring Airsoft Sniper Rifle?

Its Bolt action obviously and i want to know what to use to lube up the bolt because its pretty dirty so i gotta clean and then grease up. So im wondering if i can use a real firearms' lube for it Please help and feel free to give examples. here's a link to a pic of the gun gotten on google images :http://shop.ehobbyasia.com/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c230972d/w/e/well-mb01c_1_mark.jpg