Warning - display polish
This is a warning!!
Products such as Displex Display Polish (Scratch Remover) will permanently damage your screen if you try them.. Please don't (even just to see what happens).
These acrylic polishes are not made for touchscreen devices.
They will in fact make big scores and scratches appear on your screen just like a scouring pad would do..
Now, back on topic, I use a screen protector. They are great and leave a smooth glossy finish.
You wouldn't know it was there. They are a must-have.