How to paint trim without sanding?

You shouldn't have to sand it unless there is a finish on it that would prevent the paint from adhering.

I wouldn't recommend chalk paint unless you like the shabby look on your trim.

You could prime it then paint it. Just make sure to remove any loose dirt or debris.

Make sure to use a high adhesion primer.

I've never sanded trim before painting, but every house that I have ever lived in was older. No glossy paint to be found. The paint stuck just fine. Especially if you're not changing the color.

I would just clean the trim well and let it dry. As long as you are using the same brand and color as well as the same sheen paint I think you will be fine.

If it’s peeling, then sand down the peeling spots. Otherwise, just re-paint it

Make sure you use the same type especially if you don't sand like enamel, flat or gloss. I'm definitely not an expert.

Sanding does even lightly gives better bonding. Going from stain to paint good sanding, kilts and then paint.

Clean with TSP and you should be fine.

If you are painting over raw wood you might want to prime first. If you are painting new baseboards that are not yet attached--consider using spray paint--or paint in a paint sprayer--goes much faster and no brush marks.

I'd wash them with mild soap and water to get the dust and dirt off. High gloss looks nice.

Sanding helps the paint to adhere, however, if it is too hard for you, you can buy a liquid sander that can be applied to create the same roughed-up surface to help the paint adhere. You can buy it at any home improvement store in the paint department.

I have done it both ways. I found that priming the baseboards before you paint works well.

If they have been painted prior, I would recommend sanding. If raw wood, no, you won't need to.