I recently order a motorcycle tank kit. I cleaned the tank out with the Aqua clean and let dry. This actually did a good job and a lot of loose rust was washed out leaving quite a bit of bare metal visible.

I then used the rust blast for about 30 minutes. I rinsed it as thouroughly as possibly and let it dry. A rust like coating formed over most of the surfaces even the ones that were clean after the Aqua clean. Some of this can be rubbed off.

How should I proceed before using the rust seal?

cheers

Here is a link to the instructions: http://www.kbs-coatings.com/RustSeal-Information-and-Instructions_ep_38-1.html

It is not necessary to remove every last bit of rust before applying RustSeal. RustSeal is very capable of bonding to & permanently sealing any remaining flash rust or corrosion. After treatment with RustBlast, a slight white powder residue may appear. This is a zinc phosphate coating advantageous for RustSeal adhesion. Items treated with RustBlast can remain uncoated for up to 30 days depending on environmental conditions.

As long as you have followed the instructions, you will want to proceed with RustSeal.