73- Coloring Blotchy Woods
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This video is from a live demo I did on Wed. Nov 19th, 2008. The topic was staining blotchy woods. After the demo, I’ve included a portion of the Q&A from the chat room. Thanks to everyone who participated!
General Finishes Gel Stains
A Simple Varnish Finish DVD
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THANKS for recording and posting. Very much appreciated.
Thanks for posting this Marc, always hate to miss the live stuff.
In reference to the longevity of finishes when exposed to air. I wonder if you could fix a tap (’Faucet’ in American?) to the can? i.e draining the finish from the bottom and never exposing it to the air?
Just an idea.
Looks like you uncorked a another great video, Marc. Thanks.
I have a finishing question for you, should you get a chance to answer:
Q: I have used General Finishes Seal-A-Cell as a base coat and then applied multiple coats of Arm-R-Seal. I started with the Seal-A-Cell because that’s what the manufacturer recommended, as I recall. The results were great, but I’m not sure what the difference is between the Seal-A-Cell and the Arm-R-Coat. Is the Seal-A-Cell really necessary, or helpful as a base coat?
Very interesting idea Wizer. Now someone just needs to invent the Varnish Tapper. :) But I love the concept.
Good question Germain. I used to do the same thing because I was actually under the impression that Seal-a-Cell contained some raw oil, as in an oil/varnish blend. I thought this would make for a nice base coat that you could then top with a hard-curing varnish like Arm-R-Seal. After years of working with the stuff, I have come to the conclusion that Seal-A-Cell is nothing more than a wiping varnish, with a slightly different formula that Arm-R-Seal. My guess is it contains slightly softer resins, but I have seen little to no evidence of it containing any oil at all. In some side by side tests, I have had a lot of trouble telling the difference between a board finished with Arm-R-Seal only, vs one that was given a coat or two of Seal-a-Cell at the start. Based on that, I have made the decision to stop buying Seal-a-Cell, and buy Arm-R-Seal only. If you need more amber color than the Arm-R-Seal provides, try giving the piece a light coat of straight boiled linseed oil and wiping off all the excess. Give it a day or two to dry and come back with your Arm-R-Seal.
As much as I enjoy General Finishes products and I believe they are a top notch company, I do think Seal-a-Cell is redundant. Now if you’ll excuse me, I need to shower, which means I will be “rinsing and repeating” until I run out of shampoo and have to buy more. ;)
Marc, that was a great demo and discussion. And hearing good Questions and good Answers is a double bonus.
Thanks again.
Jim
Hey Marc,
Nice show. I like the relaxed pace and the good information. 99% truth and only 1% BS (due to the corrections) ;)
We must be cousins in a parallel universe, because we seem to be tackling the same types of projects/issues at the same time – quantum entanglement?
Well, I just wanted to share some information about finishing I gained from a recent experience. You see, I just finished an entertainment center, made of hard maple solid and ply woods. In my research about how to deal with blotching, I read multiple posts on Sawmill Creek advising that an aniline dye was the way to go. So I tried it.
My results were not good. I wiped some alcohol/Transtint-based dye onto an untreated test piece and ended up with blotch from hell. Maybe a water-based would have worked better, but I didn’t bother to try.
I really like the results you got with the SealCoat/gel stain – very nice. I’ll have to give that a try some time.
In any case, I decided to go with a natural (no stain/dye) clear finish for my piece. I’ve finally figured out how to spray Lacquer effectively and am very pleased with the results.
Keep up the great work.
–Sal
Hey, great answer, Marc. Thanks for that information. I also like General Finishes products. But I’ll forgo the Seal-A-Cell.
I’ll give that technique of starting with a coat of BLO a try. I happen to have a can of it sitting on the shelf.
And remember, no matter what conditioner you’re using, it doesn’t create a waxey buildup like all the others.
Oh, one more thing. I think Wizer has a good idea there about “tapping the can”. Unfortunately, in order for it work, you’d have to supply a vent to eliminate a vacuum. The vent would supply air, thus negating the intent of preventing air from entering the can.
Now, if you could come with a way to dispense finish in a collapsing bag, like cheap wine in a box, that would be awesome!
Marc,
Love your concept. You are a great teacher.
I am getting ready to stain and finish the hardwood floor in my recording studio and your advice on sealing/staining gives me the confidence to do the thing.
Thank you,
Chris
Actually, there is an accordion-like bottle for finishes. It looks like an accordion and as you dispense, you collapse it down. I remember getting email about it or maybe saw it on a site (I thought toolmonger.com), but can’t locate it now. It was on a closeout when I first heard about it so maybe it wasn’t popular. It would certainly do the trick and I thought of getting it for this reason but the size was too small.
While a kegerator is a fine idea, I think a varnirator isn’t. That said, I’ll just try making more projects to use up the finish before it goes bad. :-)
Marc, great show. Here’s a tip I got from another woodworker in North Carolina. I found it really difficult to pour from those great big metal containers without getting stuff all over the work bench, floor, on your hands etc. (I’m all for sterilizing chisel cuts, but boy does it smart…). The secret is to pour towards the handle, i.e. keep the spout high. I know, it sounds ridiculous, but give it a try.
Thanks Marc. I suppose you can apply water or alcohol based dye after a 1 lb cut.
Real question. I have a JacPak CO2 Waist Band Air tool supply. I’m thinking I could give cans a blast of the CO2 before sealing the can for longer storage. On the other hand CO2 could react with some things. Perhaps Argon gas wouldn’t react but I doubt I could get a paint ball tank filled with it.
Marc, I recall hearing or seeing somewhere that the difference in SealCoat and Arm-a-Seal is the wax is removed from SealCoat. The wax supposedly can cause top coat problems.
Hey Richard. Give a little squirt of the CO2 and see what happens. While not an inert gas, it is still heavier than air and should displace the oxygen-containing air.
Hey Robert. Just to clarify, you are talking about two different types of finishes. SealCoat is indeed dewaxed shellac. Arm-R-Seal is an oil-based urethane varnish. And yes, many folks believe that wax in shellac can cause problems for topcoats like Arm-R-Seal.
Great Demo Marc, I also use Seal -a-Cell as a base coat and then muliple coats of Arm-R-Seal. I started using that when I read it was David Marks’ favorite finish. I have alway had good results with it. I’ll give this finish from your demo a try. I will say it seems the more I read on finsihing the more confused I get. But this seems pretty straight forward and easy to use. Good Job.
As always, thank you for sharing your experience, skills, time and effort. Hope you and Nicole had a smashing Thanksgiving Holiday!
Victor
Marc- thanks for recording the awesome live demo. No matter how many times I watch or hear finishing techniques, I learn more – probably because as you say the confusing products abound!
I’m wondering about a comment you made during the show about putting varnish on top of the shellac/gel stain. When would you (or not) put another layer of shellac between the gel stain and a top coat of varnish?
The layers of shellac below, between or on top of various other applications always confuses me.
Thanks,
Morton++
Hey Morton. Basically, I will use shellac to seal in dyes. The idea is that it stabilizes the color and locks it in before you add your topcoat. This by no means is always necessary. But its a good idea when you think your topcoat might moves some of the color around. For instance, a water based dye under a waterbased topcoat. You could very well reactivate the dye and push it around a little. So in most cases, its not a bad idea to seal it in. Most oil-based stains and gel stains are pretty stable once applied to the wood and don’t really NEED any special sealing step. And if Im not mistaken, the GF gel stains might even have poly in them, which helps lock in the color.
Marc, two questions about using seal coats and dyes. First, my impression is that you always use dyes before a seal coat. Is this correct or can a seal coat also help reduce blotching before using a dye? Second, if you use water or alcohol dye on raw wood is there any need to seal it if the top coat is a clear oil based finish?
Thanks
Hey Ron. On some woods, dyes will blotch like any other stain. So its not a bad idea to partially seal the surface like I did in this video in an effort to calm down the blotching. But just like you saw in the video, the intensity of the color will decrease after the sealing step, simply because less of the dye is being absorbed.
Now one way to get around this is if you are spraying the dye. It is possible to skip the sealing step and simply spray on very light coats of a dye mixture (toner), and avoid blotching. But you need to have spraying capability.
Now if you apply a dye (alcohol or water) to a raw wood surface, it is still a good idea to seal first if you have a blotch-prone wood. If you have a wood that has no problems accepting color evenly (like oak, for instances), then you can skip the sealing step. This is the case regardless of what topcoat you decide to use. Hope that helps.
Great video, Marc. For me, it cut out just as you were talking about the shelf life of the seal a cell. I tried re-running it, same thing again, no joy. I’m guessing it’s an issue with my computer because I don’t see anyone else mentioning it here. Oh, well.
Marc – thanks for the help! I’m going to try this on a birch toybox I’m making for my kids. I’m curious what you would recommend for a topcoat? I was thinking of a couple coats of clear shellac, but I’m wondering if a wipe on or sprayed on poly would be a better choice?
Well, shellac will certainly yield a beautiful finish. But poly would be more durable. So its really up to you. Some people just hate the way varnish looks and prefer shellac. Other folks find the shellac isn’t durable enough.