Originally Posted by Grandad I've done a few experiments with sealing MDF and found that the best method was to use a sanding sealer, (clear cellulose and talcum powder) well thinned down and brushed into every visible corner and hole of the MDF sufaces. The finish coat would be a good quality two pack polyurethane, sprayed on if possible. The polyurethane can resist quite a lot of of abrasion and bangs. Incidentally this is the finish that I will use on my masterpiece when it's finished.....Rod |
Try this experiment with the finish: Hit it with every tool that would ever be used near it in a machine 20 times and then soak iit in cutting fluid 12 hrs a day for a year.
IMO, the best finish for ordinary MDF is laminate, but i would never get it near cutting fluids and expect it to hold up.