The former MSP, who is standing as a list candidate in next month’s Holyrood election, met with Resistance members James Scott and Sean Clerkin at the Royal Concert Hall steps in Glasgow city centre.
The trio made impassioned speeches in favour of national self-determination, before signing a ‘declaration of Glasgow’.
The event coincided with 696th anniversary of the Declaration of Arbroath, a letter sent by Scottish nobles in 1320 to Pope John XXII to reaffirm the country’s independence.
Clerkin told The Scotsman that copies of the group’s declaration would be sent to Barack Obama, Vladimir Putin and Ban Ki-moon, secretary-general of the United Nations.
He added the group would be looking to find 100 signatories to the paper, mirroring the famous ‘as long as but a hundred of us remain alive’ line in the Arbroath declaration.
Attendance at the event was somewhat hampered by a sudden downpour, with few shoppers stopping to listen to the speeches.
“This is a modern day version of the Declaration of Arbroath,” said Clerkin.
“We’re saying Great Britain PLC is only for the rich and powerful. We want an independent Scotland with freedom and social justice.”
Asked what response he hoped for from Obama and Putin, he said: “We hope they acknowledge Scotland has the right to be an independent nation.”
The Scottish Resistance made headlines in January when a small number staged a protest outside the Tunnock’s confectionary factory in Uddingston.
The firm had been accused of severing its Scottish roots following the launch of its latest marketing campaign in England.
It was this week revealed sales of Tunnock’s products have since increased 10 per cent.