I have been using the Griots Garage brand for a while, and not only do they work good, but they are money back 100% if you are not satisfied.
I would do this:
- wash car thoroughly
- cleanup lower fender grime last, use a clean rag and wd40 to remove any asphalt, gum, etc, wash off the oily residue with your sponge & soap, & rinse.
Do NOT get wd40 on the stripes, it will begin dissolving the adhesive.
- get the clay bar and spray lubricant that goes with the product you are using. (Use disposable gloves to keep your fingers clay free, it will get into every pore and fingernail)
- clean one panel or a 2x2 foot area at a time, wipe down w clean micro fiber go topside first: roof, hood, trunk lid top, then front fenders, doors, rear fender from the top to the belt line, nose and tail last. No clay on rear bumper unless it is spotless, avoid black trim, fender arches, or any dirty area.
- knead the clay often as you work each panel.
- do not clay bar the lowerfender area, get grit on the clay, or drop it, as you may as well just throw the clay out.
- wax with a nice carnauba, let one panel dry as you apply one ahead,
- if you have an orbital keep the temperature on the sponges cool, low to medium speed is enough.
- wipe wax off with a micro fiber towel, final buff with a cleaner micro fiber.
Dark paint looks amazing when you use a carnauba wax, it fills in the micro scratches, and after coating the car, it will look much darker, as the paint pores are clean. Black cars look ink black. The wax bonds better to the paint too, extending the time between waxings.
If you buy the Griots Garage products, their spray wax works to extend the wax even further.
If you were closer, I'd invite you over for some Garage therapy with your Monte, I have orbitals and the decision to polish the car, or just wax, is not much extra effort, as the tool does the work.
I would suggest a clay bar cleaning and waxing, the least aggressive approach first. Test the wax on the hood, see how the results are, if you have to polish it, use the least aggressive polish. If your car has any original paint, it was extremely thin, rub delicately or not at all.
Once you clay bar a car area, you are committed to waxing those areas, plan your time accordingly, invite a friend over with some cold beverage.
Speed Shine (lubricant for the clay bar)https://www.griotsgarage.com/product/speed+shine.do?sortby=ourPicks
I suggest the 35 oz bottle, the sprayers are tops!
Some of Griots Garage products are available at Advance Auto stores.
Get some micro fiber towels at Costco or Walmart