I've installed Dash overlays on many cars I've owned. Real easy to do, but it takes time and patience. DON'T RUSH!!!
Typically, you'll have the Dask Overlay Kit, which has a 3M Automotive Grade Adhesive Backing on it. You just Peel-N-Stick!
However, there's a lot of prep-work that goes in first. First, make sure your Overlays will fit exactly on the spots they're intended for, so do a Fit-Test. Make sure holes line up, edges match, etc. Also, make sure you have all of the pieces, and that they're for the applicable side of the vehicle (Driver/Passenger)
Next, grab a box of Alcohol Cleaning Pads (Walgreens, Walmarts...)
, and wipe down all of the areas where the Overlay will be applied. Dry off the areas with a Lint Free Micro-Fiber Towel.
get a tube of Adhesive Promoter in the Kit. This will be applied to the areas of your Dash where the Overlay will go on. The Adhesive Promoter, is applied in order to give the 3M Adhesive Tape something to bond to. And BELIEVE ME...
bond!!! After it completely dries, then you're ready to apply the Overlay. MAKE SURE YOU GO EASY ON THE ADHESIVE PROMOTER!!!
It's very thin and runny, so you don't want to apply too much at a time, and have it running down your Dash or onto your Console.
Start applying the smaller pieces first, like on the Door Panels, so you can get used to how they apply. Peel the Red Backing Tape off as you go, not all at once. That 3M Tape is Super-Sticky-Stuff!!! On the Smaller Pieces, apply them from the edges of the application area, and smooth them out with your fingers as you go. You want to make sure you get all of the Air Bubbles out as you go, otherwise you'll have Bumps-N-Lumps in your Overlay.
Do the Dash last. By now, you'll have an overall idea, how the Overlay applies, and the Do's-N-Don'ts you've encountered along the way. It's best to line up the Holes on the Dash, so you can get the Overlay properly centered. GRADUALLY.....
apply the Dash Overlay Center-First, so your Knobs are not touching the sides of the Overlay. They should be perfectly centered. Smooth out the Overlay from the middle-out, making sure you get any Air Bubbles as you go.
Take your Micro-Fiber Towel, and Push as you Wipe, to make sure your Overlay is flattened down as much as possible. You don't want any sharp or raised edges, otherwise, it'll start peeling back when it gets hot inside.
Did I mention, DON'T RUSH?????
BTW, here's a company I've used since 2002. EXCELLENT
product, and I've always had a perfect fit on all of their kits I've purchased. You can even Mix-N-Match Kits, and get a few more pieces to complete your design.
Wood Dash Kits, Dash Trim Kits, Auto Accessories
Make sure, you're buying the Right Kit when you order! They have kits for the Full Doors With/Without the Power Window Switches, and Half Doors with Manual Switches.
Best of Luck!