hello friends.
Concerning the Open Day, well sincerely I do not think you need an invite to attend it. During the Open Day they just show you how life is in Dubai and explains a bit about cabin crew job. Of course they will collect your CV and photos and ask you few questions, basic questions like what are you doing at the moment etc...
As for AD, well usually they will phone you or send you an e-mail to inform you when and at what time to come. AD you cannot go like that, I mean without being asked to.
Tattoos - well in my opinion I do think that it is better to be sincere because they might notice it when you go to Dubai. It wont be good for your image if you lie.
Well am not 100% sure in whatever am saying as am not cabin crew or HR coordinator for Emirates.
I am waiting for the Golden Call...
