Replies

1. 
   Rich14 | Jan 19, 2007 12:56am | #1

   willy,

   Absolutely, yes! The MDF will attract dust and dirt and will begin to smell if left unsealed/finished.

   Shellac is an ideal sealer. Sand the sled smooth to 180-220 grit. Use one dilute coat to seal the MDF. Let dry for an hour. Then level the raised fibers with 320 grit. Then finish with a 2# cut.

   Rich

2. 
   highfigh | Jan 19, 2007 01:19am | #2

   Shellac will work fine or if you want a longer lasting coating, use polyester resin and dilute it, laying it on with a cheap brush in a thin coat. Any high spots can be sanded off after it cures. I used poly resin for my bench that is used for mainly non-woodworking, like greasy/oily or paint/solvent jobs. If it gets too nasty, I wipe it down with whatever solvent or cleaner I want or is handy.

   "I cut this piece four times and it's still too short."