Yes radio shack cat. no 276-1535a PCB etchant solution
aka ferric chloride. you only need to dip the parts in it for 30 or 40 seconds! then put them in a bath of water & baking soda to stop the etching. they should be a medium to dark gray in color let dry and paint
A list and a plunge and down she goes to Davy Jones.
Raiders of the Deep