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Tips on sanding MDF?


raspberry
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I think I'm looking for disappointment...

I'm working dutifully on my beautiful Newport and thoughts keep straying to my un-touched Woodstock, and I'm wondering if anyone has any tips or secrets on the sanding of MDF to help make it smooth...

i.e. sandpaper grit, don't use sandpaper use fillintheblank, etc.

I've tried searching for this, but you can't type only 3 letters into the search bar...and there is a LOT of posts to just paruse through...

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DHE's houses are all made of MDF and they recommend a coat of watered down glue before painting to "seal" the house and make it smooth. If you do a google search on "sanding MDF", there's a ton of websites for woodworking that give ideas on sanding it. Be sure to vacuum it before you try anything towards finishing since the fibers go everywhere.

I had good luck with the paper-bag sanding method on the Vermont Jr. but I don't think I was going for as smooth a finish as you.

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I painted a first coat of paint without sanding, and then once that was dry I sanded with 220 grit sandpaper. After sanding I wipe off the surface with a damp rag, dry, and put another coat of paint. Sand, wipe, dry, paint. I think I ended up with about 3 coats of paint on the exterior of my Painted Lady. It was a lot of work, but the surface came out very smooth. I use this process with anything MDF that I want a smooth coat on.

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