is it allowed to bring spray paint cans in airports not to hand carry it but inside the check in luggage?

Answer 1

No. Spray paint is considered a hazardous material/disabling chemical, and is not allowed in your checked luggage.

Here's a complete list for what's allowed in your carry-on and what's allowed in your checked luggage:
http://www.tsa.gov/travelers/airtravel/prohibited/permitted-prohibited-items.shtm

Answer 2

no. even if it was i wouldn't do it as the pressure in the cans will explode as the plane gets past 14000 feet.