Re: Polyurethane Sanding Question
Ive found applying the veneer itself very easy. Achieving exactly what I wanted, which was a darkened walnut veneer with filled grain and a flat gloss finish, not so much.
Through experiments and advice from David mainly, Ive found in general this is the approach ill be using:
-Apply veneer, using minimal wood glue, and spread as thinly as possible with a sponge. This is key, especially with the grain patterns of the veneer i'm using. Too much glue and its possible some areas of the veneer become saturated with glue and will then not take any stain or dye. Ensure its as well clamped as possible, and extra glue around the edges is wiped up, or this will make cutting it harder when the glue dries.
-Cut the excess, sand the edges, and VERY light sanding over the veneer to reduce any higher bits of grain. Again, too much and you hit glue and again the stain wont take.
-Apply cellulose sanding sealer, well shook but a thin coat to prevent further imperfections.
-Again VERY light sanding or you risk removing the stain- this even happened with Liberon spirit dye.
- Apply several coats of lacquer before even thinking about sanding. And again, sand VERY lightly after a few coats and build up some more.
With the above you can fill all the grain and achieve a flat finish. It is very time consuming, but apparently not as much as with poly varnish! At least with car lacquer you can be sure a coat is 100% set after 1 day.
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