Guild Wars 2

Hi, I looked through the first 15 or so pages of this section of the forum and could not find an answer to my query.

If I bought an Armour Skin set from the Gem Store am I limited to the amount of times I can ‘reskin’ my armour?
The character i’m playing and plan on buying the skin for is only in it’s 30’s, so could I reskin every upgrade I get with Transmutation Stones/Crystals?
Can I use the normal Transmutation Stones/Crystals (ie Stones for level 1 to 79 and Crystals for level 80)?

Thanks very much in advance.

Of course you can. Otherwise it would be a shame.

Thanks very much for the quick response (for the tell explaining ingame too )