You could call someone that refinishes bathtubs , they have an epoxy that they spray .

Best part was after the clients saw all the work we had to do to get rid of the bird, bird nesting debris, spray disinfectant, and repair all the voids to the exterior of the home to prevent this from happening again they never questioned my now exorbitant labor intensive bill.

We spray every unit before move in and at tenant request...We use Demon(hardware store) which works great!!

Or that an underground sprinkler isn't popping up and spraying directly onto the wall (which is what it look like).

If you like painting, go out and spray some paint on those walls.

Spray with coil cleaner, wait 5 minutes, hose off.

Your use of rigid foam and/or spray foam, I would think, are better materials than the commonly used R-13 faced batt.

Heres what I do for a couple of guys that rehab . first we cut the grass as low as possible , then we double dose it with fert and lime, then we spray the entire lawn with round up , killing everything.

New double-pane windows with spray foam in the cracks around them is the easiest and most cost-effective way to do this.

However, I do know how to refinish wood (radios), so we will probably refinish all of the cabinetry in our house (also a good excuse to buy an HVLP spray rig...).