A man who attacked his partner with a makeshift mace and poured turpentine in her eyes also sent racist text messages to an acquaintance in the weeks before the attack, a court has heard.

Nikki Parkinson, 37, has pleaded guilty in the ACT Supreme Court to charges of endangering human life, endangering human health and using a carriage service in a menacing manner.

The violent rampage began when Parkinson's partner refused to let him drive her car to the Waramanga shops to steal alcohol in February last year. He reacted by throwing a wheelie bin and a chair at the woman, before producing a hand-made weapon described by police as having ''gaffer tape wrapped around the bottom with bolts [or] screws embedded in the top''.

Parkinson slammed it down on the car several times while the woman cowered inside. He also poured turpentine on the woman's face, temporarily blinding her, and threatened to set her on fire.

He was arrested later that evening driving back to the property and returned a reading of .132.

The attack occurred within a month of sending racist text messages to an Aboriginal woman he met through a community support group.

A sentencing hearing on Tuesday heard Parkinson began contacting the victim in late January.

He sent five messages over the following week, four of which featured racist taunts and included pictures of a swastika.

The court heard Parkinson sent an apology after the initial messages, but then sent a further two bigoted texts four days later.

A Commonwealth prosecutor told the court the recipient received the first text message at night when she was at home with an eight-year-old, causing her to fear for their safety.

The prosecution argued the offences were high to mid-range and Parkinson should be sentenced to a jail term. But Parkinson's lawyer said the man's plea of guilty showed remorse for his actions.

Justice Hilary Penfold is expected to hand down sentence next month.