How do I redo a mobile home bedroom with dark paneling?

Unless you want to take it down you’re gonna have to paint them a lighter color , maybe lt beige or something

Paint.

Make sure the paneling is clean and dry. Prime with a good stain blocking primer like Kilz. Then paint like painting regular walls. Acrilyc latex paint will work. If the paneling has grooves you can fill them with non shrink drywall patching compound. Just put on enough to fill the grooves. Let it dry overnight. Next day use a damp sponge to smooth the patch. Then prime and paint.

just lightly sand it to rough the shiny finish up,wipe it off well, then primer it(Kilz or Zinsser) and paint it whatever color you like; pale/light green-soothing restful "According to a survey conducted by Travelodge, participants who slept in a Blue room got the best night's sleep, clocking in an average of 7 hours and 52 minutes of sleep per night. Moss Green, Pale Yellow, and Silver followed close behind; Purple was determined to be the least restful room color, with participants sleeping an average of just 5 hours and 56 minutes per night. Sterile Whites and primary colors, like Red, which implies danger and has been linked to increased blood pressure, should also be avoided, says Dr. Michael Breus, a clinical psychologist and sleep specialist in Scottsdale, Arizona. And opt for a flat finish instead of glossy. “Colors are softer and more atmospheric the flatter they are,” Kennon says.

You can clean with TSP then prime and paint. Try it in a smaller room and leave the grooves. I think you'll be surprised how "OK" you are with leaving them. Or you can do something really cool and paint it stripes by painting 2 tones of the same color alternating between the grooves.

You can put up wallpaper but you will need to put a medium over the grooves first. I've done that at my parent's home with 1 wall in the dining room.

You can drape fabric over the walls if you just want to hide them. Think wall to wall window covering.

Wash 1st with vinegar and dish soap. Paint let dry paint again. I haven't had problems with it coming off. Don't put anything on it for a week or two.