the pains for vertical blinds work great and you can see if your local lowes or home depot have any end cuts from when they trim them to certain size or buy a pack of the smallest pains you will have a life time supply.
i use some stuff called LAs awesome orange from the dollar tree 64oz for a buck and i have had great luck with it like over night and most all paint is gone
i just use a plastic shoe box with a lid and it work's great.