Thats a great find for new terminals, many different choices. Ill be sure to check those out for some future projects!
I buy alot of used trains, most of them have corroded battery terminals. What I do is strip the train down and remove the terminals, and soak them is clr or any strong calcium/lime scale remover. If left in there for about 1 min, they come out looking like brand new with all the corrosion is gone. In most cases it looks like nothing ever happened, sometimes if the corrosion is realm bad it leaves some putting but they still work great!
I buy alot of used trains, most of them have corroded battery terminals. What I do is strip the train down and remove the terminals, and soak them is clr or any strong calcium/lime scale remover. If left in there for about 1 min, they come out looking like brand new with all the corrosion is gone. In most cases it looks like nothing ever happened, sometimes if the corrosion is realm bad it leaves some putting but they still work great!