- First Name
- Mike
- Joined
- Aug 9, 2021
- Threads
- 10
- Messages
- 814
- Reaction score
- 1,506
- Location
- Scottsdale, AZ
- Vehicle(s)
- 2019 Civic EX Hatchback
- Engine
- 2.5L Hybrid
Nice work MacGuyver'ing that thing! Thumbs up!
Sponsored
4 coats of bed liner "paint" should last pretty well. As long as he keeps moisture away from mdf. He should have used "flexible" bed liner so that it wouldn't crack and let moisture in. I don't believe he said which bedliner he used. Osb/4 would have been better but most lumber yards do not stock it.Interesting solution. I still get the feeling that the MDF won't last long though.
I considered ordering in something outdoor rated, but the coating makes the substrate irrelevant, at least as far as durability against weather. Ply may be more durable as far as weight capacity on top, but it's still surprising how much durability is added with the coating. I would not be surprised to see this last 3-5 years.Nice work.
There is a product we call Medex up here in Canada. It is MDF that is used for "exterior" use but not for direct moisture. It would do better but still needs to be sealed good. I think standard MDF will have a limited lifespan.
A better material would be Baltic Birch. It has more plys than standard plywood and is more stable with each ply being birch. The edges sand nice and is light compared to MDF/Medex. It comes 5'x5' here in Canada available at Windsor Plywood or PJ White. It would be my pick over MDF.
Formply/Crezone/Crown 45 would be a good option as well. I would use double sided as it is more stable.
Your probably right. As a finishing carpenter I have developed an obsession with choosing the correct product for the job. You might want to back out any fasteners and add PL or some kind of glue in the holes for a little extra peace of mind. Any penetration, chip or wear-through spot will be the weak point. It looks good and if you get 2-5 years all the better. Might do the same thing.I considered ordering in something outdoor rated, but the coating makes the substrate irrelevant, at least as far as durability against weather. Ply may be more durable as far as weight capacity on top, but it's still surprising how much durability is added with the coating. I would not be surprised to see this last 3-5 years.
You build a kit and sell it on eBayCan't find a cover I really want yet, can't keep waiting so this will have to hold me over until someone makes a cover that is perfect for me. 3/4 MDF with bed liner paint all around 4 coats, still need to paint the piano hinge and screws with a flat black spray paint. Hinges just under the halfway point so I don't hit the back window.
Turned out better than I expected, still a few more tweaks to do, easy to remove as I just pull the EMT out of the eye bolts and fold it in half and carry it away.
The back can be held down with a bungie (that way I can hang long stuff out the back). I used garage door weather stripping, it works ok, I may change it out for something else though.
![]()
![]()
The mdf is around 60 lbs, the fence posts are 20 lbs each, but being cut shorter maybe 12-13 lbs each. So overall around 85 lbs, but since it's all components the heaviest is just the mdf.Nice solution to your needs. How much does the whole works actually weigh?
I saw a thing where these guys painted metal body armor plates with bed liner to reduce spalling. It actually worked to some extent. It's tough stuff.Bedliner paint is surprisingly waterproof, it also stiffened the board considerably. I was planning on adding some runners as the sheet was sagging just carrying it before, but it really helped it with that paint alone. I would bet it'll last 3 years easily.