Old concrete floor

here is more info for you

https://www.thespruce.com/painting-basement-floors-3959355

you can paint it, acid wash it, stencil it

Paint it. Ideas from other Hometalkers

https://www.hometalk.com/search/posts?filter=paint%20concrete%20floor

Vinyl plank flooring! It’s affordable and the install is pretty straightforward. Here’s the pros and cons: https://www.frugalfamilytimes.com/2019/08/luxury-vinyl-plank-pros-and-cons/

Seems like the eaiest thing would be to put down a area rug. Not only would that look nice but it would add some softness to the area and you wouldn't be putting your feet on cold concrete. If you wanted to get fancy you could paint a rug on the floor.

You can paint and stencil it. Or do a brown bag stain.Prepare the room by removing all the furniture, rugs and other items. Open windows and doors to provide ventilation.

Sand the concrete floor with a floor sander using 180-grit sandpaper. This will remove any old coating and rough the floor to accept the adhesive.

Clean the floor using a mild detergent and a mop. Allow to dry.

Cut or tear brown paper bags or craft paper into the desired shapes and sizes. Tearing creates a more random appearance while, cutting makes the floor appear planned and intentional.

Apply epoxy-based glue to the back of one of the pieces of prepared paper using a paintbrush and stick to the center of the floor. Do not saturate the paper with the glue. Smooth it using a wallpaper brush.

Stick additional pieces of the prepared paper to the floor surrounding the initial piece until the majority of the floor is covered, overlapping the pieces slightly. Continue to smooth the paper with a wallpaper brush, pushing out any wrinkles or bubbles that may form.

Fill in empty spaces on the floor with small pieces of the paper until the floor is completely covered. Allow the floor to dry for at least 12 hours.

Coat the floor using a polyurethane sealer. Apply with a paint roller and allow to dry. Apply a second coat.

I agree paint is always option. The first thought that came to my mind though was, because its a sunroom, you could go look at the outdoor carpeting options they have on hand at your local big box store like Home Depot etc. They have lots of inexpensive options in that case and you can have it cut to size and bring it home that day.

You can clean it well and then paint it. You will need to use an etching cleaner. If you get very creative, you an paint a pattern to look like tile or a rug look.

We had the same problem, took up the wall to wall carpet and there was the stark cement to do something with. What we chose was to have tiles put down.

I personally agree with painting them. I also agree with creating a pattern to make the tile look like a rug.

You could paint it with a Flor paint or re-tile it or lay Vinyl or do a Paper bag floor or book floor.

You can paint it in any color you want or even mask off areas and do a color block to really create some interst. After painting you could stencil. Depending on the look you want you could even apply a Rustoleum product called "Rock Solid" that provides a very hard shiny surface that will last for years. Alternatively, you could use area rugs to provide texture and interest and change the designs out when you want a refresh. You could do a bit of concrete repair and tile over the concrete.

Paint it. Stencil it or paint the whole thing and PAINT on a carpet. Add hand painted fringe to the edges. Use a stencil or stamper to make your painted on rug have a design.

We have a painted concrete floor-in our laundry room. The paint holds up marvelously and its easy to clean, Much more so than our hardwoods!

Would about faux hardwood stick on tiles?

You could paint it and stencil it

Here's my solution. Worked great. And add a pretty carpet over it for added oomph! https://www.exquisitelyunremarkable.com/2018/08/how-to-paint-concrete-patio-makeover.html

Paint is a great and inexpensive way to give it a new look.

Here's a project you might find helpful. https://thecrownedgoat.com/stencil-concrete-floor-like-pro/