for those that have seen my 67 know that it will need alot of this stuff. i plan to use it on the floors and under the roof after i pull the hedliner out. also in the drip rails and A pillars. by question is this though.... for the drip rails i will need to fill holes as well besides actually killing the rust. will i be able to apply filler over the POR-15? is it a sandable product? will i have any adhesion problems when using something alont the lines of USC All Metal filler or Evercoats Metal 2 Metal? how about if i choose to lead the areas? will the POR-15 stick to that? how is its heat resitance just in case i will be welding near it? and seam sealer... more adhesion issues. just a few thoughts that im sure ill need to address.