Wouldn't the solution for this to not be a bigger washer, but actually the opposite, a really small washer, much smaller than the star post just to get it off the playfield not touching the clear? It seems like the solution they took is the opposite that they should have done possibly. If you use a smaller washer, any pooling will be underneath the post and hidden, plus protected from chipping.
That would just be my opinion though, maybe it wouldn't work.