How do i revitalize my front door? The paint is fading. It is not wood

You could try some of that product ReNew to see if it brings back the color, or you can repaint it.

Give it a good sanding, and repaint it.

If it is metal, sand it to smooth it out and give the paint something to adhere to, then use a paint that is made for metal, like Rustoleum. It comes in many colors and finishes. Use thin coats to keep from having runs in the paint. It may be easier to have the door off and use spray paint that way, runs are harder to get that way. Good luck!

you will have to strip the exsisitng paint, prime and paint with the correct paint based on what the door is made of

Sand and repaint. Its a common problem with dark colored doors often needing repainting every 3 years. Saw this video recently on TOH.

https://www.thisoldhouse.com/how-to/how-to-paint-exterior-metal-door

I clean mine really well with a soapy Mr. Clean eraser and then wipe it down with microfiber cloths before painting. Smooth any rough spots with a sanding sponge, wipe it down again before painting. Use a paint intended for the material your door is made of. Mine are steel and I like Rustoleum paint.

I used Rustoleum Wipe New ReColor on our vinyl shutters that were faded, it was simple and looks fantastic! I just got more so I can use it on all the metal window frames and our screen doors.