Two Pack Varnish Prep Question?

[Dougal]

Hi guys n gals

I've just finished sanding and finishing a piece of Teak veneered 15mm marine ply for a new chart table.

I'm going to use International Two Pack Polyurethane Varnish, as I've had great results with that on other items.

My question to the panel is: What should I use as a final rub down before application?

I have plenty of Isopropyl Alcohol and also some Acetone.

Or am I barking up the wrong tree altogether?

 

[VicS]

8/3 pi r³

 

[Dougal]

Thanks for that. They get us coming and going don't they;-)

 

[lw395]

I believe priming with Interprotect is recommeded, therefore see the technical data sheets for Interprotect and Perfection 2 pack


https://s3-eu-west-1.amazonaws.com/...tect_eng_A4_20180129.pdf?mtime=20180222011126

https://s3-eu-west-1.amazonaws.com/...tion_eng_A4_20170816.pdf?mtime=20171030151227

Follow the advice in the Tech data sheets

It is usual to use the recommended thinner for the product as the solvent for wiping the surface. In this case, for Interprotect , Thinners no 7 which is a mixture of several solvents. ( Xylene, butanol, ethyl benzene, solvent naphtha, 124 and 135 trimethylbenzenes )

I don't think grey or white primer is going to be terribly satisfactory under a clear varnish?

 

[lw395]

Buried in the international website, it suggests de-oiling the teak with thinners 4.
Optionally 'prime' with everdure clear epoxy.

Personally I would think that using IPA to degrease would be good, but leave plenty of time for it to dry, to avoid solvent entrapment.
To remove dust at the last minute, I suggest a bit of the varnish, maybe thinned with the correct thinner (No 9), on a clean rag, as a 'tack rag', just to pick off loose dust.

 

[VicS]

I don't think grey or white primer is going to be terribly satisfactory under a clear varnish?

8/3 pi r³

Thrown off track there by Internationals new website

So prime, if required, with Clear Wood Sealer Fast Dry after wiping the surface with thinners 9 and allowing to dry.

http://www.yachtpaint.com/LiteratureCentre/Clear Wood Sealer Fast Dry Sell Sheet_GBR_ENG.pdf

Then overcoat with Perfection Plus Varnish

http://www.yachtpaint.com/MPYACMDatasheets/Perfection_Plus_Varnish+eng+A4+Y+20141215.pdf

 

[MikeBz]

I've had great results using a clear epoxy sealer (water-thin epoxy) to saturate the wood, then as soon it has gone off start hot-coating 2-pack (Hempel Diamond in my case) over the top. I did this on the grab rails on the coachroof of our boat 4 years ago and apart from around the countersunk screw heads they still look as good as the day they were done. I also did this on a Douglas Fir wooden mast some years back and it worked a treat - even where the parrel beads had pressed a flat on the mast the film hadn't shown any sign of cracking 2 years in.