sealing & finishing wood

This section is for useful tips and tricks for Aspire

sealing & finishing wood

Postby martin54 » Sun Jun 26, 2016 11:24 pm

My biggest problem when it comes to any sort of work with wood is knowing about different types of finish, what finishes work well together & what doesn't :oops: :oops:

I have a project I would like to do that will have a vcarving which will be painted, I know there are different techniques for this sort of thing from reading lots of different posts on the forum but most seem to have a final coat of lacquer after painting. I would really like to use something like Danish oil as a final finish but don't think it would soak in properly if I had used a sanding sealer prior to machining to prevent paint bleeding.
So could someone tell me the best way to go about this job from start to finish please.
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: sealing & finishing wood

Postby highpockets » Mon Jun 27, 2016 1:37 am

Martin,

I'm having luck with applying Danish Oil before vcarving then applying more Danish Oil (or shellac) after vcarving to seal the carving then apply paint, surface sand and apply final finish (shellac, poly or just leaving the Danish Oil as final finish).
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 2419
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: sealing & finishing wood

Postby martin54 » Mon Jun 27, 2016 2:02 am

Thanks, will give that a try on a test piece, wasn't sure if the danish oil would prevent the paint bleed or not, how long do you leave it for to allow the danish oil to fully dry before painting?
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: sealing & finishing wood

Postby highpockets » Mon Jun 27, 2016 2:09 am

I flood the piece with Danish Oil for at least 20 minutes checking to make sure I don't have dry areas, if so I apply more and let set a little longer. I then paper towel the project dry and use a air compressor to remove extra oil from the vcarve and dry again. I let it set at least over night before I apply a paint. I'm not sure if you have to wait that long, but it works.

If I'm trying to get a carving done quicker, after vcarving I use Bulls Eye shellac which dries in about 15 minutes. After a couple of coats to make sure I have everything covered I'll paint the same evening. Sand and finish.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 2419
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: sealing & finishing wood

Postby martin54 » Mon Jun 27, 2016 9:16 am

Thanks will give that a try, quite cold in Scotland most of the time so I tend to leave things longer to dry than others might :lol: :lol: :lol:

I can build a cnc machine, set it up & maintain it but finishing wood well seems to be a bit more of a challenge :lol: :lol: :lol:
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: sealing & finishing wood

Postby zeeway » Mon Jun 27, 2016 11:17 am

I would be concerned at the ability of the Danish oil to truly seal the end grain exposed in the v carving.

My kick at the cat: finish piece with Danish oil, then after that coat is dry, seal the piece with shellac one or two coats. Then v-carve, and paint the letters. When dry, sand off the surface and resell with shellac or varnish.

Angie
User avatar
zeeway
Vectric Wizard
 
Posts: 3157
Joined: Thu Feb 11, 2010 9:24 pm
Location: SC, USA
Model of CNC Machine: Self-built

Re: sealing & finishing wood

Postby highpockets » Mon Jun 27, 2016 1:20 pm

zeeway wrote:I would be concerned at the ability of the Danish oil to truly seal the end grain exposed in the v carving.

My kick at the cat: finish piece with Danish oil, then after that coat is dry, seal the piece with shellac one or two coats. Then v-carve, and paint the letters. When dry, sand off the surface and resell with shellac or varnish.

Angie


Angie, I've used this method also and it works fine, but in your instructions you missed a step (or at least I think you did), after vcarving do you paint the letters or apply a coat or two of shellac to the carving first then paint? Seems if you don't seal the carving the paint will bleed.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 2419
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: sealing & finishing wood

Postby COWBOY1296 » Mon Jun 27, 2016 2:29 pm

I like danish oil, but have noticed that top coats may not dry properly, so i tend to use it on raw wood only. But my favorite sealer and finish is General Finishes arm-a-seal. Unlike most poly's it does not turn your wood an ugly amber.
COWBOY1296
Vectric Wizard
 
Posts: 660
Joined: Thu Apr 15, 2010 10:03 pm
Location: SOUTH CENTRAL COLORADO
Model of CNC Machine: SHOPBOT BUDDY PRS 32, 4 FT PWR STICK

Re: sealing & finishing wood

Postby martin54 » Mon Jun 27, 2016 8:51 pm

COWBOY1296 wrote:I like danish oil, but have noticed that top coats may not dry properly, so i tend to use it on raw wood only. But my favorite sealer and finish is General Finishes arm-a-seal. Unlike most poly's it does not turn your wood an ugly amber.


I haven't had any problems with top coats not drying properly COWBOY1296 but then all this is quite new to me so don't have a lot of experience, I have however noticed that top coats can sometimes take quite a while to dry properly, I had put this down to the general Scottish weather but maybe there is another reason.
I have noticed on odd occasions a sort of tacky (ish) feel for a couple of days & had to leave stuff before buffing it, that was one of the reasons I asked how long before carving & painting highpockets left it :lol: :lol:
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: sealing & finishing wood

Postby martin54 » Mon Jun 27, 2016 8:52 pm

Oh meant to say. thanks for the advice all, will go away & do a little bit of experimenting before I set about the proper project :lol: :lol:
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Re: sealing & finishing wood

Postby highpockets » Mon Jun 27, 2016 10:35 pm

With Danish Oil there is no "top coat" it maybe the last coat, but no matter one coat or four don't leave any extra oil on the surface, wipe it dry or you'll get a sticky surface that will take for ever to dry and give you poor results.

Martin, with you being in a very wet climate, you'll need to let things dry even longer. I live near the gulf coast in a very humid area so I move my projects to a room in the house to dry with the AC on. I have a very understanding wife :D

One more thing on Danish Oil, during the drying process, from time to time wipe the surface down even after your initial wipe down. Wood will sometime expel excess oil causing a oil film on the surface, which can cause a sticky mess.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 2419
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: sealing & finishing wood

Postby FixitMike » Mon Jun 27, 2016 11:12 pm

highpockets wrote: Wood will sometime expel excess oil causing a oil film on the surface, which can cause a sticky mess.

And don't ship something that is finished in Danish oil by air until it is thoroughly cured. The lowered air pressure can also cause the oil to be expelled.
(Don't ask.)
Good judgement comes from experience.
Experience comes from bad judgement.
User avatar
FixitMike
Vectric Wizard
 
Posts: 1542
Joined: Sun Apr 17, 2011 5:21 am
Location: Renton, WA USA
Model of CNC Machine: Shark Pro Plus (extensively modified)

Re: sealing & finishing wood

Postby highpockets » Mon Jun 27, 2016 11:42 pm

FixitMike wrote:
highpockets wrote: Wood will sometime expel excess oil causing a oil film on the surface, which can cause a sticky mess.

And don't ship something that is finished in Danish oil by air until it is thoroughly cured. The lowered air pressure can also cause the oil to be expelled.
(Don't ask.)


LOL!!! Had not thought about that one. I was getting ready to ship a ring box, that's now on hold until next week. Thanks Mike.
John
Maker of Chips
User avatar
highpockets
Vectric Wizard
 
Posts: 2419
Joined: Tue Jan 06, 2015 4:04 pm
Model of CNC Machine: PDJ Pilot Pro

Re: sealing & finishing wood

Postby Leo » Tue Jun 28, 2016 2:27 am

I use Shellac to seal before applying a paint mask. After V-Carving I will again seal with shellac.

Shellac is a DNA solvent base and is also a natural plant based sealer. It dries very quickly and seals very well.

Paint will not wick into the grain and will allow paint to adhere very well.

It is a good base for just about anything.

Lacquer is also a very good and fast dry sealer.
Imagine the Possibilities of a Creative mind

www.leosworkshop.com
User avatar
Leo
Vectric Wizard
 
Posts: 2950
Joined: Sat Jul 14, 2007 3:02 am
Location: East Freetown, Ma.
Model of CNC Machine: 1300 x 1300 x 254

Re: sealing & finishing wood

Postby martin54 » Tue Jun 28, 2016 10:00 am

Mike, the UK is a bit on the small side for Air shipping so think I will be OK :lol: :lol: :lol:

Leo, most of what I have read the process involves either shellac or laqueur as a sealer but I really wanted to use danish oil as a finish & don't think that is going to work. The oil is not going to be able to penetrate through the sealer into the wood & it won't cure if it is just sat on the surface of another coating.
User avatar
martin54
Vectric Wizard
 
Posts: 4628
Joined: Fri Nov 09, 2012 2:12 pm
Location: Crossgates, Scotland
Model of CNC Machine: Gerber System 48 (modified)

Next

Return to Aspire - Tips and Tricks

Who is online

Users browsing this forum: No registered users and 4 guests