I have had good results this week on A1200 keys (sadly they dont show up on camera

) using a liquid solution of 12% HP and Oxy action.
I have all the ingredients for the gel to do my larger items; however, while picking up my peroxide from my local hair stockist I noticed they had a 12% peroxide gel.
The ingredients are as follows:
Aqua
Hydrogen Peroxide
Cetearyl
Alcohol
Sodium Lauryl Sulfate
Paraffinum Liquidum
Citric Acid
Sodium Salicylate
Would this work for the process? Or are some of those chemicals nasty that will eat my plastics.
Any help greatly appreciated