This will depend on what kind of decals. The decals made by the LEGO group is quite easy yo remove and you can do that with your nails. But custom decals are tricky. Most of the time they are perm, so you will have to get a scraping tool to get it off, therefore, damaging your Lego. That's why custom decals are discouraged by traditionalist.
Only place i know is Lego land it has every Lego batman decals
Yes, Lego pieces can go in water, it will not harm them, but may remove decals .
No
Obama Decals, Storm Decals, Jean Grey Decals, and Wolverine Evolution decals Plz!
In the lego store at mall of america.
saber scorpian.com
moc pages
I would say either Saberscorpions lair or Fine clonier decals
get a ruler!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I don't know but you can find it at Minifigscustoms.com under designs
eBay is a great place to buy Lego decals. However, you can't get them for free.
brickshelf flickr and images