It's been a long time since I was on here... thought I would pop by and see what's going on as I had 100's of notifications about the thread!
Still seems to be the same old story though... My advice would be (having been with this thread since Nov 13!) if you have found rust on an Indian built Duster, just get rid of the car - it's likely that whatever solution that Dacia have it isn't going to fix it long term. I know, I've been there, and lived through the experience.
Long story, short, is that there were key processes missed during manufacture - either the cleaning process prior to rust proofing, or the rust proofing was never applied at all. Plus then, esp. on white cars microscopically thin paint. I think there were *some* cars that were OK, but this does go back quite some time so don't remember all the details. There was a lot of speculation as to what did or didn't occur, but it's more than likely if you have rust now, the Dacia bodge will only delay the inevitable. Best to get rid.
On the up side there is, as far as I know, little issue with the Romanian Dusters; after all mine was replaced with one, and even with some nasty stone chips it's not rusting. The two cars are like night and day.