Hi,
Of corse you can, but make sure none of your payment methods have any country or price restrictions.
Let's say, you selected country "United States" for PayPal. Then, the "paypal" method won't be showed on the shopping cart page unless the visitor is logged in and provide his/her country as "United States".
If you more than 1 payment method, then there won't be any "default" method selected automatically. So visitor should click "Select Payment Method" button and choose one of them.
Attachment ScreenShot2013-12-07at7.03.35AM.png not found
After clicking the "Select Payment Method" button;
Attachment ScreenShot2013-12-07at7.02.49AM.png not found
Just like how it is on our DEMO page:
demo.flexiblewebdesign.com/puremart
Regards,
Support