Brake drum cleaning
Brake drum cleaner works very well
Next try professional hub cleaner. Twist the nozzle in front of a twist, uniform spray on the hub, you can obviously see, spray up the process there are many stains down the cleaning fluid.
We wipe, while spraying, found that the professional hub cleaning agent effect is significantly better than the clean toilet spirit, even attached to the hub of the scratch, it is difficult to wash off the stains, spray up with a towel gently wipe it off.
Although the stains on the hub cannot be completely removed and there are still some residuals, the effect is still very obvious. For the sake of comparison, we only use a towel to wipe the whole process, and it would be better if we use a brush to brush the effect.
The effect of kitchen foam cleaner is not obvious
Then try the kitchen foam cleaner. The same uniform spray on the hub, and then take a towel to wipe again, the water washed clean.
Discover than clean lavatory clever have a bit, the effect is not apparent, the besmirch on slight Nick did not get rid of even.
Iron powder remover works best
Finally try iron powder scavenger, iron powder scavenger spray up, it was originally colorless, but spray up immediately after the purple.
This is because the main components of iron powder scavenger are interface active agent and color indicator. After spraying on the hub, the oxide layer formed by brake powder has a chemical reaction.
The stains on the hub surface are slowly broken down, and when they are, the iron dust remover turns bright purple, indicating that the reaction is complete.
It can be seen that this reaction is quite fierce, stains all down the flow of the remover, and then clean with water, found that this effect is better than the professional hub cleaner, only a towel wipe has been very clean.