I have some kind of sticky black substance on my undercarrage, only in the rear though. It's probably a mix of old under coating and road tar. Will this degreaser work on that?, or do i have to remove that?
Also do you have to use por15 all at once, or can you do sections at a time? Some produducts will not adhere to themselves once they are dry. I
Thanks
Also do you have to use por15 all at once, or can you do sections at a time? Some produducts will not adhere to themselves once they are dry. I
Thanks

