Hassan Kaya left Mustafa Faiz nursing stab wounds to his head, chest and abdomen after attacking him in a barber shop that he was opening with a friend.
The attack took place in Paisley, opposite Kaya's salon, and he ran back to his shop after carrying out the life-threatening assault.
Kaya was said to have stabbed Mr Faiz with a pair of scissors.
The 36-year-old, of nearby Johnstone, was remanded in custody after being found guilty of the stabbing.
Co-accused Bilal Uruk, of Renfrew, who is said to own Kaya's barber shop in the town's Causeyside Street, walked free during the trial when Amanda Gallagher, prosecuting, dropped the charge against him.
Mr Faiz, 33, relived the attack while giving evidence against the pair at the town's sheriff court this month.
He told the court the two men had forced their way into his shop and attacked him, and that he only realised he had been stabbed after they left.