In this Test Tuesday, we are testing foam primer, as well as a couple other methods of protecting foam board from spray paint damage. For my spray paint, I am using Touch ‘N Tone all-purpose household spray paint in black. For my foam primer, I am using Krylon Craft Foam Primer in white. I am using matte Mod Podge and Elmer’s Glue-All Multi-Purpose white glue.
Keep in mind that different manufacturers of spray paint and foam primers will use different formulas and the results of this Test Tuesday may not reflect the results achieved with different brands. It is a good idea to always test any new medium on a scrap piece of foam before applying it to your projects.
I am testing on white Readi-Board and No Paper samples, as these were to two samples that were the most effected by spray paint in our previous Test Tuesday. The spray paint edition of Test Tuesday can be found here. I applied the glue and Mod Podge with a brush. I did not dilute either of these mediums. I applied two coats of the craft foam primer, following the directions on the product’s container. I also left one of each sample unprotected as a control.
Left to Right: No Paper, Mod Podge, White Glue, Craft Foam Primer
The Mod Podge and white glue samples performed nearly the same, both protected the foam from the spray paint. Peeling back the paper on the Readi-Board samples revealed no marring to the form beneath. The surface of the glue samples did dry a little unevenly. It is worth mentioning that you can see my brush strokes on my Mod Podge samples.
The craft foam primer also provided the samples with protection from the spray paint. Peeling the paper back on the Readi-Board sample show that some of the paint penetrated the paper and caused some pitting in the foam. Despite this, the sample with spray primer was much better than the sample with no protection.