The film has Emraan Hashmi in the lead and Rawal plays the role of his guru, teaching him tricks of the trade.
"I liked the script and this genre of con. I am a big fan of con-films like 'Sting', 'Matchstick Men' and others. It (this genre) is not an assault on your senses. It has intelligent material, there is logic and scientific way to do it (to do the con)," Rawal said in an interview here.
"I was also working on one of these subjects (on con). I will definitely do it but it will take time. In the meanwhile, I got this offer and found it interesting so accepted it," he added.
In real life, the 64-year-old industry veteran has been conned twice but not money wise.
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"One can con you in relations... Con you with emotions the best example is of 'American Hustle'. It is a superb film," he said.
Rawal is all praise for Emraan and feels he is grossly underrated.
"I found him to be a good and balanced actor and later I learnt that he is related to Mr (Mahesh) Bhatt. It was nice working with him I had no problem working with him. He is a very good actor... He is a highly underrated actor," he said.
On playing the role of Prime Minister Narendra Modi in a biopic, the BJP MP said, "The scripting is still going on... almost 70-80 per cent work is over. It is a tricky one (film) as biopics are often made on those people whose career has ended or there is a full stop (to their career) but this man (Modi) has just began his innings.
"So what to do and how to take it ahead... Is where we are having difficulty.