I have used it with great success. As mentioned above having a clean area is critical. I used a brass brush to start then followed with 0-0-0 or 0-0-0-0 steel wool. Didn't want to use the wool becuase I thought there might be some residual rust, but in the end I have had no problem. The green sticks are an adhesive so I found getting the metal hot enough to melt the stick was not needed. I just cleaned the rivets or seams up really good and warmed them up to where the surface was hot to the touch, then I just used the torch to melt the end of the stick and dabbed it onto the rivets. Before the material would set I would go over it one more time with the torch to make sure it melted good around the seems. One word of caution with this method WATCH for dripping. If the melted sealent touches your skin it is like napalm. It will burn and burn and burn and leave A NASTY scar. So wear long sleaves and leather gloves when applying. Happy Dabbing