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Post by rod on Aug 11, 2008 4:55:24 GMT 1
Well thats my question to you all. In Australia we're at the hull finishing stage and I've been experimenting with different ideas but just can't seem to get that perfectly smooth hull finish. I'd like some comments from those fo you that have achieved a nice hull finish to offer up your tips and advice.
I've been sanding, filling, sanding, priming, sanding and I fear I my not ever get there. I tried a sanding sealer as suggested by someone but it really doesn't do squat. I'm interested in those that don't use glattifix as we don't have it here in Australia.
I might even work up some photo's to show how I am going.
Your experiences welcome.
thanks
Rod
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Post by Deleted on Aug 11, 2008 5:41:13 GMT 1
I'm at the sanding down 1st layer hull planking now and it's taking ages, any ideas anyone.
Thinks about an orbital sander - rofl ;D ;D ;D
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Post by Model Boat Mayhem on Aug 11, 2008 10:58:24 GMT 1
I'm halfway through the 2nd layer planking. I used a Black & Decker "mouse" sander on my first layer of planking, the trick is, "how much do you sand it?" Answer, "I dunno!" Just keep sanding till it feels smooth. The first layer of planking fives the final shape of the hull, the 2nd layer is for the finish... sort of!
I'll be using decorators filler to get the final finish and then many coats of sanding sealer (I bought a 1 Lite can off ebay) to seal the wood and fill the grain, it's not a wood filler.
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Post by Mark on Aug 11, 2008 12:29:29 GMT 1
Sand it smooth, so you get rid of all the lumps and hollows. Fill if necessary. Try to keep the amount of filler to a minimum. Sand again using a finer sandpaper. Sealer is really only necessary if you're going to sail the model, or if the grain of the wood is coarse. I used wet n dry to sand the hull. Start with something quite coarse, say 120 grit, to take the hull down to a smooth surface. Not really smooth, but gets rid of all the lumps & bumps. Then use progressivly finer grits, down to about 400 or 600 grit to get rid of all the scratches and roughness. This should give you a finish that is smooth as a baby's bum. Then spray with a light coat of primer and sand it off with fine paper. This will show up any defects, and you'll be surprised how many there are in what looked like a perfect hull. Fill these and sand them smooth. Now spray with primer. Leave it a couple of days to harden properly and flat back with 600 or 800 grit. That should give you a prefect hull ready for a top coat. However, I wouldn't apply the final primer until you're ready to spray the top coat (which won't be for ages).
Couple of tips, change your sandpaper often. Keep your hands clean - nothing worse than a dirty hull to ruin a good paint job. You probably need to sand more than you think. Many models would be improved by further sanding before painting. Stop if you think the hull is getting too thin. Gaps between teh planks need filling of course.
Hope that helps
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Post by ph on Dec 12, 2008 17:01:21 GMT 1
Iv used car doby filler on me hull to full some holes in,anyway thing is that i dident use the rite amount of hardener and the filler is still tacky. Iv scraped most the filler of but the wood still feels tacky. Can i just go other the parts again with filler again then sand back down. cheers paul
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Post by Mark on Dec 14, 2008 12:11:39 GMT 1
It should be OK - the filler should go off eventually, even if there was too little hardener.
You could use some nail varnish remover to try and take off some of the stickiness.
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Post by ph on Dec 15, 2008 22:44:53 GMT 1
Cheers Mark Ill wait a wee wile and see if it goes off if not ill use some nail varnish remover and try that
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Post by trigger on Apr 12, 2009 13:57:05 GMT 1
Hi chaps, Just come across a wood finishing product called BRUMMER. The YELLOW type is a putty which is very easy to apply and sand. There is also a GRAIN FILLER which is in the form of powder and when applied with a damp cloth will give a finnish as smooth as glass. Has anyone else tried this product?
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Post by giderian on Jun 30, 2009 12:20:39 GMT 1
Good day, everyone.For those of you who is pulling their hair out of their heads about finishing the hull: I have been there, and yes, it is maddeningly frustrating! I covered the whole hull with wood filler, sanded it smooth with sandpaper & after doing this sprayed the hull with a primer of Tamiya German grey from an aerosol can.The above method is not perfect, though, & still takes a LOT of time, but with patience a favourable result can still be achieved.The process may be repeated a couple of times to get a result that is personally satisfying.Thanks for a great site for all Bismarck fans!
Johann Coetzer, South Africa
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Post by coenie on Jun 30, 2009 17:06:17 GMT 1
Hi Giderian, check out Mark's direction on Aug 11, 2008. That's about the way I was going and I'm satisfied with my hull. Further to Mark's directions, I used up to a 1200 fine sand paper. For this exercise, alot of patience is the best companion. Don't try to rush. I used about ten coats of grey primer and between every coat there was some filling into tiny gaps, etc. I also moved from more coarse sandpaper between every coat of primer to a very fine sandpaper of which I end up using water with the sanding to smooth the hull to my satisfaction. O yes, I also obtained a sanding block from one of my Panelbeater friends that goes with the curves of the Bissy (a type of a hardend sponge) that assist you not to "over sand" in some areas. This exercise took me about two months as you might know that time is not always on Bissy building's side.
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Post by eric on Jul 1, 2009 15:51:05 GMT 1
Hi Giderian, welcome to the forum!
Your hull sounds great.....any chance of some pics? You might want to start up your own build diary to chart your progress.
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