This question seems only accidentally related to gardening. In general, I would imagine tool and tool repair questions would be better asked at the Home Improvement site.
There are tool-related questions that would be better asked here, such as whether one tool or another are better for some gardening task or questions in which the gardening aspect of the question is the most important aspect of the question.
Or am I being too picky?
(The distinction between this question and this one is that I think the question would be fine except that the Home Improvement site exists and might give better answers.)
Home Improvement was always going to have a lot of overlap in these sorts of areas. I think that provided the tools are generally considered appropriate gardening tools, the questions are best answered by gardeners and belong here.
It'll start to get hazy when you have tools that are used both for gardening and home improvement, but I think these cases will be rare, and should hopefully be obvious when they do happen.
Most gardening books have sections on tool maintenance, selection and repair. I figured it was appropriate to ask here, although it probably could have floated on DIY.
It wasn't really about how to keep it from rusting, it was about the appropriateness of painting tools. I was kind of wondering whether or not painting the points of tools is a good idea. A. Because it will just wear off and remain in the soil and B. Because it would make the sharp point rather less sharp. I didn't ask that in the question because I figured someone would put that in their answer and I didn't want to draw out only the answers I could figure out on my own.
I disagree that this question should have been closed. Questions related to owning, using and/or maintaining the tools used to garden and landscape should be on topic in gardening and landscaping Q and A.
Personally, if I am looking for options on watering, tilling, weeding, lifting, digging I want to hear from gardeners and landscapers as opposed to migrating to the land of electricity and plumbing and appliance repair to get a less targeted response.
However, tools should fall under a more general equipment tag that includes things like fertilizers and compost bins and rain barrels and other supplies. The means of gardening and landscaping are important to the site.
I think questions about garden tools, usage, maintenance etc should be allowed here.
To say that they should be migrated to diy is like saying a question about stopping cats crapping on my borders should be migrated to pets.stackexchange.com. OK the question might technically be about a non-plant object (cat, fork, mower) but it's a gardening problem and expert answers are most likely to come from a community of gardeners.
I would probably say that it belongs on the home improvement site because the gist of the question is: "how do I prevent this from rusting?". It is not in any way related to the art/science of gardening.