This liquid foam sprays out of a can through a straw directed exactly where you want to fill gaps.
Painting over spray foam.
Paint over the gesso with water based latex paint in the color of your choice.
Fill in cracks with insulating foam and then paint it.
After allowing the foam to harden and cure sufficiently you can paint it any color you want to ensure that it blends with surrounding surfaces.
Avoid any oil based or other solvent based.
It is also beneficial because it is much gentler on the spray foam.
And although it might be a way to improve the overall appearance of an insulated space that has not been covered with drywall much care must be given to the paint and the application.
Painting over spray foam insulation is not a straightforward undertaking.
Only water based acrylic or latex paint should be used on foam insulation whether you are using the material for crafts or are painting unfinished walls.
This is because it takes far less time compared to painting over it with a usual bristle brush or roller.
And although it might be a way to improve the overall appearance of an insulated space that has not been covered with drywall much care must be given to the paint and the application.
Use foam brushes or a roller.
Avoid using spray paints as they will dissolve the styrofoam.
Apply as many layers as needed for full coverage and let dry.
Painting over spray foam insulation is not a straightforward undertaking.