Recently, I purchased the KBS Cycle Sealing kit. I have applied KBS Klean and RustBlast as directed to a rusty motorcycle gas tank. The products removed approximately 85% of the deposits from the metal. However, two 2-3" strips of rust still remain in the bottom of the tank after repeated applications. Would applying the seal now allow it to properly adhere over these rusty areas, or should these significantly rusted areas be treated further before the sealant is applied?