product to help cut down on dust even when sitting in my garage

This is a generalization, but wax attracts the most dust, followed by sealants, then least attractive tends to be coatings.

There are some hybrids that offer exceptions to the rule, but that's where you'll have to research to find what works for you.

Each step down the attraction scale is usually accompanied by a more tedious preparation step.

The more organic or natural...the more it attracts everything....even bugs. That deep, wet look has a price.

I tried a few LSP and what surprise me in dust repellency was Sonax polymer netshield.
They are other products that claim this too (anti-static), just look around

Nuba's always attract dust its the price one pays for the depth they add. Meguiars Ultimate Liquid Wax or WGDGPS 3.0 on their own always kept cars cleaner for longer in my experience. Spray waxes I stay away from as they dust magnets

FK425 QD has anti-static properties and is super slick.

That's nigh onto impossible, since:
Dust particulates and Gravity are everywhere.



Bob

Since your car is being kept in a garage my best advice would be a very light, very soft car cover.
A custom fit flannel cotton cover. It's what I have been using since Oct 2002 on my 03 Cobra.

I live in a very dusty area and my garage is at the end of a long driveway that has a wall on one side and a 2 story apartment building on the other. So all the crud is funneled into the garage.

But with the flannel cover on the car and a thin plastic drop cloth over the covered car it has stayed clean between washes for the lase decade. And the plastic drop cloth has kept the car cover from getting a layer of dust on it which WILL over time sift through the cloth and get on, and possibly scratch the paint.

Just make sure that you fold the cover on and off the car. Don't drag it across the finish.