In reply to chrisaustralia: A lot of the crags right close to Arco are polished as anything, pretty much don't bother with Massone, like trying to climb a crag made out of butter.
Nago does have some gems worth checking out, try Esuli Lontani and I Soliti Ignoti.
Much better option is to go a bit further out from Arco, La Gola. Lot less polish, free camping (if you're subtle) and sick climbing.
Further out again is Val D'Algone, bit higher up so cooler too. Scenic little crag in the woods by a river, not polished at all.