123 Iron Remover is essentially a touchless cleaner, you can agitate it with either a microfibre towel or a brush if needs be.
Directions for use:
For best results use 123 Iron Remover after Shampooing, rising and drying. 123 Iron Remover comes pre-diluted to the correct strength for safe exterior use.
Next, spray Iron Remover on liberally. As any iron contaminants dissolve into solution, the initially colourless liquid will gradually turn purple over a period of 1-2 minutes.
After 1-2 minutes, or once the dark purple solution has dried fully, thoroughly rinse the surfaces you have treated with a strong stream of water. If you let the solution dry fully, you may need to use a stronger jet of water from a pressure washer to remove the hardened film.
(Please wash and rinse any brushes or microfibre towels out after use, should not be used on bare metal parts,brake calipers, wheel balancing weights, or SMART paint repairs. Mask off these areas.
This should be used in a well-ventilated area. Keep out the reach of children)