Painting plastic ?

I just bought older ATV for renovation. Plastic fenders, mudguards and body covers looks a little boring and worn out by sun and water.

Plastic doesn't look like fiberglass laminate, so I am not sure how good adhesion will be.

Can I spray paint it with nice red automotive paint ?

Or most likely paint will crack and fell off - due to flexing and vibrations ?

Any recommendation on the paint and preparation ?

As above you can get good plastic etch primers nowadays which give you your solid base coat.

or you could go the full lair and send the bits of to get chromed

Some plastics are a "b**" to paint. Most paints almost literally slide off.
Best way I found is [1] patience and [2] lots of elbow grease. You're going to need to sand the plastic back to create a bonding surface, hmm about 600 grade emory paper should do it. Some plastics are enamled or gloss coated. You have to get rid of that layer by sanding.
Now treat it like doing a panel on your car,
Sand with 800, 1200, and anything higher until it's as smooth as a babie's bum.
Apply a primer or spray bog but lightly.
Sand again, starting from 1200 up.
Apply primer again
Sand again.

Now - you can apply your paint. Car paints all the way and primers.

Clean it really well with detergent and hot water and then using a hot air gun on high temp keep moving it gently around until the plastics surfaces becomes glossy once more.
It's really important to do it as evenly as is possible. Not to hot in the one area as it will shrink if it's over heated.
The area as it's heated, floats off all the oxidization and it returns to it's original colour.
Some of the deep scratches can even be floated out with a bit of practice.

Try it out on a smaller piece till you get the technique right. Practice on a faded plastic bucket or plastic garden tools that have lost their colour due to exposure to the sun/light.

Some larger components take a bit of time to get right.

I repair buckled motorbike fenders where they get the white creases across them. I plastic weld splits and cracks and this is how I restore the whole component to its former glory after doing the localized repair.

You can then use conventional polish to keep it looking good.

I recently bought some plasti dip type spray paint. have used it on my mud guards, windows wiper arms, fenders and it has been going well. cost $20 from local bunnings and used less than half a can. have been trying to find other things to spray with it as it looks great.
beauty of it is you can peel it off if you don't like it. Also easy to apply since its just a spray can.

Wrap it, baby! Adhesive vinyl is dead easy to apply, looks good and can be replaced when you're tired of it.

Durhhh , sorry just read your thread properly, it's coloured plastic, thought it was trims

Plastic looks fine, what do u want to paint it for?
When u said faded I thought you had a Honda that had turned pink lol

Faded sand/camo colour is nice, just recon the black

I wouldn't be touching that.
Looks ok now and for all the effort a good polish will do just as well. Get the rest sorted out before you go to tart it up.

Plastidip mate, its good stuff

On black plastic pieces I did try today black shoe polish in the form of liquid. Works like a dream, hopefully will stay like that on the sun and rain for some time.
$3 per bottle.
Even seems do not stain clothes on contact when is dry.So maybe later on only Sandy Yellow to Bright Red paint for upper panels will help a bit.

I did replaced also head lights bulbs from 18W halogen to LED Cre, to save on power.

Don't forget to Armorall the seat.