*Be sure to read the product instructions in their entirety; but here's the run down!*
The first thing you need to do is clean the tile. Start with soap and water then use alcohol to remove any residual residue.
Next you'll scour the tile with the steel wool or 400 grit sandpaper
Now mesure out and mix up the cleaner then throughly clean the entire surface area with TSP
You'll repeat this process twice.