Help with ca finish - International Association of Penturners
     International Association of Penturners
Pens for Service Members
 
Support The IAP

Go Back   International Association of Penturners > Community Forums > Penturning
  Forgot Password
Register FAQ Members List Search Today's Posts Mark Forums Read
Penturning General penturning discussions not specifically addressed in one of the specialty forums.


Logged on members can hide ads!

Welcome to penturners.org!

You've found the home of The International Association of Penturners. You are currently viewing our site as a guest, which gives you limited access to view discussions, photos, and library articles.

Consider joining our community today. You'll have full access to all of our content, be able to enter our contests, find local chapters near you, and post your questions and share your experience with our members all over the world.

Membership is completely free!!

If you have any problems with the registration process or your account login, please contact us.

Reply
 
LinkBack Thread Tools Display Modes
Old 01-11-2017, 12:28 PM   #1 (permalink)
 
Join Date: Jan 2017
Location: Alabama
Posts: 20
Photos: 0

Default Help with ca finish

I'm very new to pen turning, having recently completed my fourth pen. An ongoing issue that I am having is with my ca finishing. I use the lathe on its lowest rpm (500) to apply the ca. I drip about 3 or 4 drops while my paper towel is under the blank. Then I wait 1 or 2 minutes for it to dry. I did this 12 times then when I would sand (1500, 1800, 2400, 4000, 12000 grit) for about 30 seconds each blank. After I was done sanding, it seemed that most of the finish had come off. It was a very inconsistent sheen. I tried going to 15 applications and holding the wet sanding pad more lightly but this resulted in not getting it perfectly smooth (ca buildup in spots). Then I tried sanding more and the finish just came off again. Im not sure what to do
Andyww is offline   Reply With Quote Top
Old 01-11-2017, 12:55 PM   #2 (permalink)
 
Join Date: Aug 2015
Location: Lawton, Ok
Posts: 2,579
Photos: 7

Default

After applying 12 layers of CA, wet sand at 1000 grit for around 10 - 15 seconds ... check to see if it's smooth and uniform in the scratch pattern.

Apply Plast-X or similar plastic polish, jump to high speed to buff ... turn off lathe to check scratch pattern again.


Apply 3 - 6 more layers of CA if needed (these should now go on VERY smooth).

Wet-sand with 1000 up to 12,000 micromesh for 3 - 5 seconds per pad ... use lighter pressure on the lower grits, medium pressure with the highest grits. Don't forget lateral sanding between you grits (lathe off, lightly sand in line with the spindle as you rotate the blank by hand to remove/break radial lines around the barrel).

Polish again with Plast-X or similar plastic polish, and check your results. Apply a wax top-coat like Turtle Wax Hard Surface or similar waxes, or buff with carnuba wax.


It would also help, if you want to sand down to a perfectly smooth finish, to start with applying Thin CA (to soak into the wood surface and fill in minor imperfections), and then switch over to Medium CA to build thicker layers, but you may have to wait perhaps 5 minutes between each coat.
__________________
Click Here to go to Pen Turner's Anonymous Meeting

Attendance is not mandatory, unless you're addicted to turning pens.
Likes: (1)
Skie_M is offline   Reply With Quote Top
Old 01-11-2017, 01:06 PM   #3 (permalink)
 
Join Date: Jan 2017
Location: Alabama
Posts: 20
Photos: 0

Default

Ok i see. You get your layers of ca smooth and then add a final bit to fill in any issues with the coating. How long do you wait to sand after the first 12 coats?
Andyww is offline   Reply With Quote Top
Advertisement
Old 01-11-2017, 01:23 PM   #4 (permalink)
 
Join Date: Aug 2015
Location: Lawton, Ok
Posts: 2,579
Photos: 7

Default

Just till it's dry to the touch (not tacky) ... if I feel the slightest tug, I know I messed up the surface and I need to do a quick touch up sand (wet 1000 grit) and apply a few more layers.


The thin CA likes to fill in 1000 grit (and similar grain size) scratches quite effectively. Your 1500 grit would work too, but I think 2000 grit wouldn't be quite aggressive enough in getting the major defects removed. Anything rougher than 500 grit would probably remove way too much way too fast.


Even if you have 12 layers built up, they are very thin ... remember that most of your CA actually ends up soaking into your applicator pad, unless you are using a craft foam pad or a little pen parts baggie, which won't soak up CA ....


If you use that method, you will want to use MUCH LESS CA per application.


I also use BLO (boiled linseed oil) just before the first application of CA ... helps to make it go on even smoother. My BLO comes from Minwax Stain'n'Seal (natural amber color). Helps to make the grain REALLY pop, and the CA application freezes it like that.



This is a picture of my Samples box. You'll notice that I turn a lot of blanks round, and then sand, finish, and polish them while they are still full length blanks. This helps my potential customers see what a finished pen may look like, and also helps me to streamline the process of making a pen ... it's already round, I just need to chuck it, cut to length, drill, ect ... I turn all my barrels round before cutting and drilling, so this does save me some time as well.

You'll see the finish results I get here from merely sanding up to 1000 grit (dry, bare wood), cleaning the wood (you see I didn't clean the one third from the left at all, I was in a hurry), applying my finish (minwax + ONE COAT of CA), wet sanding at 1000 grit (very lightly, under 5 seconds), polish with Plast-X.

The beads in the top right are all off-cuts from Breast Cancer Awareness pens.
__________________
Click Here to go to Pen Turner's Anonymous Meeting

Attendance is not mandatory, unless you're addicted to turning pens.
Likes: (1)
Skie_M is offline   Reply With Quote Top
Old 01-11-2017, 01:28 PM   #5 (permalink)
 
Join Date: Jan 2017
Location: Alabama
Posts: 20
Photos: 0

Default

This makes alot of sense. I really appreciate your help. Im also going to look up this oil you are talking about. Thank you so much
Andyww is offline   Reply With Quote Top
Old 01-11-2017, 01:36 PM   #6 (permalink)
 
Join Date: Aug 2015
Location: Lawton, Ok
Posts: 2,579
Photos: 7

Default

Boiled Linseed Oil is available from many big box stores as well as many wood shops ... I get mine in a half-gallon can from Wal-Mart, but I hardly ever use it... I like the Minwax, which I got in a 1-quart can over a year ago, and I haven't gone through a quarter of that yet. I like it a lot because it helps darken and deepen the wood grain, making it shimmer and sparkle (chatoyance), and as it's also a SEALER, it helps fill in the wood grain as well before the first layer of CA goes on.


edit - half a gallon of BLO from Wal-Mart was around 6 bucks, I think ...

the 1-quart can of Minwax came from McCoy's Lumber Company, cost me 11 dollars ... still well worth it!
__________________
Click Here to go to Pen Turner's Anonymous Meeting

Attendance is not mandatory, unless you're addicted to turning pens.

Last edited by Skie_M; 01-11-2017 at 01:37 PM.
Skie_M is offline   Reply With Quote Top
Old 01-11-2017, 01:45 PM   #7 (permalink)
 
Join Date: Jan 2017
Location: Alabama
Posts: 20
Photos: 0

Default

How long do you wait for the oil to set? Im assuming it doesnt really "dry"
Andyww is offline   Reply With Quote Top
Old 01-11-2017, 01:56 PM   #8 (permalink)
 
Join Date: Aug 2015
Location: Lawton, Ok
Posts: 2,579
Photos: 7

Default

I don't wait at all ... I apply the CA over top of my Minwax IMMEDIATELY ... I even use the same paper towel applicator that I used to apply the Minwax.
__________________
Click Here to go to Pen Turner's Anonymous Meeting

Attendance is not mandatory, unless you're addicted to turning pens.
Skie_M is offline   Reply With Quote Top
Old 01-11-2017, 01:58 PM   #9 (permalink)
 
Join Date: Jan 2017
Location: Alabama
Posts: 20
Photos: 0

Default

Ok awesome. I gotcha
Andyww is offline   Reply With Quote Top
Old 01-11-2017, 02:03 PM   #10 (permalink)
 
chartle's Avatar
 
Join Date: Mar 2015
Location: Pgh, PA
Posts: 574
Photos: 0

Default

There are methods that use alternating BLO and CA layers. BLO works just like accelerator.

Here are some videos.

https://www.youtube.com/results?sear...pen+finish+BLO
__________________
Cliff
chartle is offline   Reply With Quote Top
Related Content
Logged on members can hide ads
Reply

Bookmarks

Tags
ca finish , finishing , penturning , sanding

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 05:13 AM.

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

Content Copyright © 2003-2016 by Penturners.org, LLC; All Rights Reserved
Terms Of Service   Acceptable Use Policy