Reddit reviews 3M Sanding Sponge Single Angle, Fine grit, 4.875-in x 2.875-in by 1-in
We found 2 Reddit comments about 3M Sanding Sponge Single Angle, Fine grit, 4.875-in x 2.875-in by 1-in. Here are the top ones, ranked by their Reddit score.
Reusable For Cost EfficiencyCan Be Used Wet Or DryDesigned With A Durable, Flexible FoamRinse and reuseUse wet or dryFor detailed areasFine Grit SandpaperRinse and reuseUse wet or dry
i've found what works decent for cleaning dried paint out of grout are those angled sanding sponges
Great advice from /u/Mizumeowz.
I use gesso on my foam props so would also recommend it. I apply in very thin coats, usually with a foam brush (like these), allowing each coat to dry thoroughly before applying the next one. I also sand in between coats, using a sanding sponge with fine grit (like this one). Sanding in between coats will make the surface smoother. Make sure to use fine grit though and apply light pressure - using the coarser grit or sanding too hard in general will easily eat away the gesso. Also, make sure to wear a mask and goggles when you sand because the dust is very fine - you definitely do not want to breathe it.
Good luck!