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glass smooth paint finish on wood

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SavannahLion:
I have never succeeded in getting an ultra-glass smooth paint finish on wood, composite or anywhere in between.

I can do it on plastics with scale models, but wood... I've always accepted it as a property of the wood.

So I was just about to buy some hard board for the project when I spotted white hard board just a few slots away and for about $4 more. It appeared to be enamel and it was exactly the kind of finish I wanted. Glass smooth. I didn't buy it the store because I'm probably going to chip and scratch the finish as I drill my holes.

So ---fudgesicle--- that noise, I want a glass smooth finish on my panels too!  :hissy:

WTF am I missing? How do you guys get that ultra smoother than a new-born baby's butt glass quality on wood based products?

The last time I attempted it, I was still in school. I sanded the crap out of the wood with increasingly fine grades of sandpaper until the dust practically floated on top. But as soon as I threw on the primer (I can't recall whether it was oil or water based, could that be my mistake?) the wood grain came out and I had texture.

I wasn't able to get the texture out because the lower grits just scratched the hell out of the paint and the higher grits just clogged. I ended up redoing that particular project and just using a stain. That's how frustrated I was.

HaRuMaN:
MDF, paint, sand, paint, sand, paint, sand, paint, sand, paint, sand, paint, sand, clearcoat, sand, clearcoat, sand, clearcoat, sand...

Le Chuck:
Ond has a great how-to for painting.  He gets teh amaze-balls results.  Other than that, if you want to beat grain you can always float the top with bondo. Then it will be just like painting one of your models. 

SavannahLion:

--- Quote from: HaRuMaN on September 13, 2012, 02:50:30 pm ---MDF, paint, sand, paint, sand, paint, sand, paint, sand, paint, sand, paint, sand, clearcoat, sand, clearcoat, sand, clearcoat, sand...

--- End quote ---

It's a playfield so......

lilshawn:

--- Quote ---(I can't recall whether it was oil or water based, could that be my mistake?) the wood grain came out and I had texture.
--- End quote ---

this.

prime/sand/prime

is it smooth or are you still seeing grain? if so sand/prime

smooth yet? no grain? no? good! paint. yes? sand/prime.

still smooth? no? sand/paint

smooth? no? sand/paint

etc...

basically you have to apply a layer and ensure it's smooth before you get the next one on there.

any small defect is going to propagate itself to the top of the paint.

once you get your final clear coat on there you buff that shid till it looks like fresh peaches. treat it like a car.

clay bar is your best friend. smooth that out and it will look like the clear over the paint is 12" thick.

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