Originally Posted by
glenn bradley
I think Ed is talking about MDF and my entire top is made from 4 laminated 3/4" layers of it. It supports my two vises and the dog holes work fine. I hit the top with a 50/50 mix of BLO and mineral spirits about 3 or 4 times, let it gas-off for about a week and then paste waxed it. It has held up very well BUT, I do have the edges supported with a fir frame. The edges of MDF will not hold up well unsupported.
When connecting the layers, keep a map of any metal fasteners if used. This will avoid problems as you add miter grooves or dog holes in the future. I stuck my map in an envelope and stapled it under the bench so I won't lose it or put it somewhere "special" :D. It has already come in handy a couple times.