Tile Edges - help pls

[Brutus76]

Hi! I saw a couple of comments about this before elsewhere on forum, but still wanted to ask:
I have a few outer corners in a tiled bathroom where the tiles overlap, without a corner trim (my wife wanted them 90degrees...). Now we have white porcelain (carrara marble looking) tiles where the inside is greyish and very visible for the outer corners. I was thinking either to put nail polish, silicon of some kind or grout colerant on the sides / but since I have never done this, I wanted to check if any suggestions?? Thanks!

 

[ree]

Its a bit late in the day to be thinking about outside corners. However, there are are outside corner trims available - they should be fixed before the tile but you could do a spot of remedial tile work.

A select few makes or styles of tile have radius'ed edges but its doubtful that they are available to you.

Dont attempt to color the edges - it will come off and look awful. I have no knowledge of any permanent stainer/marker. Perhaps others do?