Sure, it might require a tiny bit of thinning with plain old rubbing alcohol depending what you are using to spray it, but we modellers have been using our airbrushes to top coat our models before putting decals on so they don't 'silver' (develop that vexing translucent gray around the edges of the decals on flat paint schemes). You could probably paint it on with an inexpensive brush since it's designed to be used on kitchen and bathroom vinyl floors with a mop which ain't the highest tech form of application or a fine misting spray bottle. The stuff flows out and levels itself, the key is to make sure you catch all the drippy places so gravity won't leave you with a hard 'pearl' drip, you can CAREFULLY used a folded paper towel or non linting cloth to 'dab' the collected drips as you work, the key is not to do the whole thing at once or you'll be busier than the one legged guy with the spinning plates act in the carnival.
Alternate plan, get an inflatable kids pool, several gallons of the stuff, and invite a few buddies over to 'lend a hand for a few minutes on Saturday, I'm buying the pizza and beer':lol:
Actually, a cheapo inflatable pool, some 2x2's or something simular (like stiff critter wire fabric) to hold the pool up and off the project and a 49 cent thin plastic drop cloth are perfect to cover the project while it dries to keep dust and critter hair, or pollen like we have going on here right now (gawd but I love my black JEEP covered in yellowish/green dust)