http://support.kbs-coatings.com/ Support Forum - KBS Coatings » Topic: black residue en Mon, 15 Mar 2010 12:41:26 +0000 http://support.kbs-coatings.com/topic/1727#post-2373 Wed, 15 Apr 2009 08:01:16 +0000 KBS Coatings 2373@http://support.kbs-coatings.com/ As long as it is a light residue, you should be fine. http://support.kbs-coatings.com/topic/1727#post-2357 Tue, 14 Apr 2009 04:35:25 +0000 trey51 2357@http://support.kbs-coatings.com/ I am sealing a cycle gas tank which had no visible rust. I used the aquaklean and after drying I then used the rustblast. I turned and sloshed the tank every 5 minutes and the solution was in for a total of 25 minutes. After pouring it out and rinsing well, there appears to be a black residue left inside. Is this normal and acceptable?