There was little paperwork when you only had one other employee and barely anyone needing help, and that was why Arthur often found himself bored within his department.
Few witches and wizards bothered to enchant Muggle items, and fewer still would send the enchanted items into the Muggle world for an unsuspecting Muggle to find – there were still some who did, though, but they were few and that was the only reason he had a job to begin with.
Removing curses, as interesting as it was, wasn't anything like removing curses from Dark Artefacts as they did a couple of floors above him, but it was also less dangerous. Molly certainly liked the fact that the worst thing in his job was the possibility of having his fingers nibbled at, or the confusion that came with a key that seemed to continuously be disappearing.
The boredom was still there, though. Arthur was certain most people would be glad to be paid to do a job where there was little, if any, work to be done. The only time his office got more busy was during the holidays, when gifts were given to relatives - sometimes gifts people hadn't realised were enchanted.
It was surrounded by hundreds of Muggle Artefacts, large and small, with nothing else to do that had originally ignited his curiosity about the uses of the devices. As a Pureblood, he had never been able to examine the oddities of the Muggles - and their creativity to thrive without the use of magic. Arthur wouldn't have believed it, and often still didn't.
Enchanting the objects himself had been a natural next step. What would be the best way to counteract the enchantments? By knowing how the enchantments were done in the first place - or to be able to assume, and then find a weak spot to remove the enchantment.
That was how Arthur explained it, at least. Molly probably knew differently when he explained it to her, but she hadn't said anything, choosing to ignore the fact that her husband had an unusual interest in Muggles. Arthur thought she might have even chalked it up to him being more interested in his job, which usually boded well for a promotion.
She was quiet until he brought the enchanted car home and began spending time enchanting the car. The Ministry had a few cars of their own, Arthur had seen them and the Notice-Me-Not charms on the car, and had wanted to copy it.
It was a hobby of sorts, and it staved off the boredom he felt returning from the nearly abandoned office; and it did help make going to the Ministry everyday a little easier. It meant a day of thinking about how to fix the problems that had come up while enchanting the car the previous day.
But it also started bothering Molly when he would step out of the floo, drop his suitcase, and head straight for the shed, only leaving when he heard her calling them for dinner.
To the point where she charmed the shed shut, and refused to acknowledge his pleas to unlock it.
(Facing Molly's wrath by removing the enchantments himself wasn't worth it.)
The Golden Snitch [Uagadou, Biloko]: 12 Days of Christmas – 9 Wombats Working: Write about Arthur Weasley