RADAR is a very good idea! It is very easy to be done by everybody, who has a legal business and wants to trade worldwide. To get a license you need next:
1. License requirement
2. Constitutive acts of the company and the last two years alternations
3. Simplified certificate from the state Commercial Board
4. IPTU Guide of Verification or Rural Territory Property Duty Declaration
5. Proof of address
6. Address proof and copies of the ID and CPF of the legal responsible for CNPJ
7. Password form
More information here: http://brazilianlawblog.blogspot.md/2013/06/step-by-step-for-brazilian.html
Good luck!