The trick with Alclad is to make sure your base coat is perfect. It has to be painted gloss black and have a very smooth surface. Then, like said earlier, lite coats applied. I always just use about 2 or 3 coats. Spray about 8" away from the part.
Another paint to use that is just as good as Alclad is Spaz Stix Mirror Chrome.
http://www.spazstix.com/mirror-chrome-aerosol-instructions
If you take the same steps it turns out just as nice. Keep in mind that your base coat black has got to be completely dry before spraying the chrome.
Keep in mind, after you paint with this stuff, you can't buff it or wax it. It will come off.
Another one I've used is Dupli-Color Chrome #CS101 and if you again use a gloss black base, this paint looks pretty good.
As far as "Bare-Metal Foil, it does look good, but I don't think the sticky backing will last too long when Summer time rolls around. But, I never tried it on car plastic before. Just model cars.
Once again, it's best to make sure the surface is cleaned.
Then using an Xacto-knife, cut lengths as needed. When applying, use a cotton swab to adhere it to the surface. Then take a wooden tooth pick to work out all the wrinkles. Finally, take the Xacto and cut off the excess.
Again, it will work for awhile, but IMHO not for the long hall.