Years ago when I pulled my 88k front bumper on my 89 that was mostly garaged and replaced in 90 something from damage before I owned it, the front support was already getting bad. I made some stencils to repair from another low mileage quest I had access to but ended up finding one of the last oem replacement front supports around 2010. When I put it back together I cut channels in the foam to direct water across and slits going towards rad to direct water away. I also sanded and coated the support with a POR 15 style coating after a sealant coat. After a few hundred miles and few washes I pulled some of it apart and it appears to be draining and holding up fine.