Sporting knee guards and inky fingers two Megalo staff crawled 35 metres pushing the squeegee along the screen.

Once the big push was over, it was all hands on deck as staff, volunteers and spectators carefully peeled the screen away to reveal a design.

Staff had a few sleepless nights in the lead up to the spectacle mulling over the structure and weight of the screen and making sure there was enough ink to go the distance.

Megalo board member Max Bourke said he was astonished how quickly it all happened.

"It probably only took five minutes from one end to the other which was brilliant - I thought it would have taken much longer," he said.

"There was a lot of set up work. Assembling the screen today took three hours, not to mention the hours of work that went in to creating the stencil."

Megalo artistic director Ingeborg Hansen said the design, a detailed timeline of the organisation's history, had taken several months to finalise.

"Today is our 35th Birthday so it is our 35-year history really without accommodation and the highlights of each era," she said.

"We started in 1980 as a screen print collective running workshops for youth homelessness and various other organisations at Ainslie Village, we then moved to Hackett Primary, Watson and then Kingston."

The organisation registered the attempt with Guinness World Records in August but rather than paying several thousand dollars to have someone officiate it, video and documentation of the record breaking attempt will be submitted for review.

"The last guys that did something like this were in the US and there's was 22 metres," Ms Hansen said. "We wanted it to be big and we are pretty confident we've done it."

Plenty of shoppers out snapping up Christmas gifts at the nearby Old Bus Depot Markets were taken by the collection of archival prints for sale, while others made their own for free at a screen printing table.