Branding on plywood-need to remove?

[Mr Efficiency]

Better to test all aspects, for sure

 

[gonzo]

The plywood is marine grade, but made for forming concrete. The coating is to prevent adhesion, which is a problem if you want to bond anything to it.

 

[DogCavalry]

The plywood is marine grade, but made for forming concrete. The coating is to prevent adhesion, which is a problem if you want to bond anything to it.

Bizarre that they would make marine grade ply for form work.

 

[fallguy]

The plywood is marine grade, but made for forming concrete. The coating is to prevent adhesion, which is a problem if you want to bond anything to it.

Thanks Gonzo!! My main fear was bond problems with plastic. Epoxy will probably not bond to it and even if removed, a glue for the adhesion may be lower strength than a 2000 psi epoxy bond...

 

[Mr Efficiency]

As fallguy indicated, conduct a test of all aspects that concern you, allowing a reasonable cure time for any epoxy adhesion test

 

[fallguy]

As fallguy indicated, conduct a test of all aspects that concern you, allowing a reasonable cure time for any epoxy adhesion test

Not after Gonzo's post. Forget about that concrete forming board rebranded as marine ply..

 

[Mr Efficiency]

You can still test it, you can't test for species durability I guess

 

[gonzo]

Bizarre that they would make marine grade ply for form work.

Not really. The plywood gets reused and usually stored outside in the weather. Marine plywood will have a longer service life.

 

[DogCavalry]

Not really. The plywood gets reused and usually stored outside in the weather. Marine plywood will have a longer service life.

Excellent point.

 

[mariobrothers88]

The black plastic on the Chinese marine plywood is very easy to remove with an electric planer so removing it is pretty trivial.

 

[mariobrothers88]

Hi guys so I did a 1 hour hard boil test of the Canadian marine plywood (red) , Chinese consmos marine plywood (yellow) , Birch plywood (green) , and okoume marine plywood (blue) . Here are the before and after photos.

It looks like the consmos Chinese faired the best although most of the black plastic melted off. All three marine grade plywoods survived the test only the Birch disintegrated.

Based on this, I'm leaning towards the Chinese consmos brand and planing off the black plastic with an electric planer (very easy to remove). But what do you guys think? Would you still go with the Canadian marine ply?

 

[Blueknarr]

There would need to be an extreme price/availability difference to justify me using the cosmos. How must time and effort is it going to take to produce a surface that has uneven plainer tracks. How much more time and effort to rectify the plainer tracks?

 

[gonzo]

Planing plywood is a bad idea unless you are planning on laminating a relatively thick layer of fiberglass on each side.. The veneers are balanced; they are the same thickness and symmetrical.

 

[DogCavalry]

Unless your time is worthless, the Canadian takes it.

 

[mariobrothers88]

Hi guys so I met the actual owner of the hardware store and he told me that the consmos plywood is NOT marine grade (despite what his workers told me)! I already used it to fabricate the outboard motor mount which I spent a lot of time on already so it seems like a big waste to just throw it away and redo it with the Canadian plywood. I was thinking of using it but covering it with a veneer of 6mm marine grade plywood to protect it from the elements. Do you guys think that would work or just redo it with the Canadian marine plywood?