unsanded grout. help?!

[One Day]

I need to grout some super-tasteful polished Stainless Steel mosaic. Am i right to remember that weber joint pro is unsanded? If not, what is aside from butech's specific grout?

 

[Tile Shop]

What colour are you looking to do them in?

Had to be testing these recently. These are the grouts I tried:

Mapei Kerapoxy - scratched to hell
BAL Micromax 2 - scratched
Adrex FS - scratched (but only very slightly. could only be noticed when looking at a certain light angle)
BAL Microflex Wall - not scratched (but only available in white, ivory and ebony...... yuk!).

The best looking was the Ardex FS Shimmer Grey, but need to find a solution to remove the faint scratches whilst leaving a polished finish.

So even though i'd hate to hijack a thread before its even begun, anyone got any suggestions? (at least its related and may be useful if Impish runs into difficulty). I've tried Autosol, G3, with a combination of various Dremel attachments. They either don't touch it or are way to aggressive.

 

[WetSaw]

Kerakoll Fugalite Eco?

 

[One Day]

Thanks so far. Ideally i want a silver grey. Think i may have to go with microflex white, the only one i know won't scratch.

 

[Tile Shop]

How about BAL standard grey wall grout (very pale) with the GT1 additive?

 

[WetSaw]

I don't know whether the "invisible" Fugalite would reflect the stainless steel and make it look like you have sliver grout.

 

[Spud]

Mapei ff silver

 

[macten]

Mapei SF
(super fine)
I tested the FF and it scratched the hell out of the last ones I fixed.
SF did the trick

 

[Kyle Knowles]

Keracolour flex is un sanded

 

[Stef]

I used micromax 2 on Porcelanosa stainless mosaics & it left them with a very faint swirl on them.
The client never noticed but I did & wasn't best pleased as I was assured that the grout wouldn't mark them.

 

[MTiler]

Mapei Keracolour FF ?