Hi, lot of dust collected, hopefully some money is collected as well. MDF is a little bit complicated for finishing. After several intents the best way I found based on products available in local market is quite simple. First to all I prepare a kind of ........ Sorry I don't recall the name of the product, LOL ( gloss.), but I get 1 part of white glue and 1 part of water, get both mixed and apply it softly into the mdf, make sure the firs coat is gently applied in order to avoid damage in the face of the MDF. Get it dryer and repit, some sanding and it will be ready for paint. After painted, aply one more coat of the proper es gloss and you got it. That's my way