I just tried this with good results. I created an 8"x8"x0.05" flat plate in SketchUp and loaded it in MeshCam. I generated the toolpaths for my 1/4" end mill that I purchased from McMaster Carr. I did a parallel surface finish in the X axis with 0.1" step over.
One of the things I ran into was the tight tolerance between the edge of the work surface and the X axis limit switch. I had to test the job several times and play with tool zeroing to get the job to run without hitting the limit switch. Changing the machining margin to 0 in the toolpath window in MeshCam was critical.
I've uploaded two youtube videos on the process. One showing the job running, and the other showing the results.
So, I'm calling this a success for probably tripling the life of a spoilboard.
I was planning to upload both my stl file and nc file here, but it looks like we can only upload images. Guys - it would be nice if we could use this forum to share models and toolpaths. Is that doable?