What do you use to finish? [Archive] - Artist Forum

: What do you use to finish?


TerryCurley
08-19-2015, 09:19 AM
I am curious what products others use to seal their paintings. I have been using Wilson Bickford's Glazing Medium, but I'm getting less and less happy with it. I actually think it is dulling the colors of my pictures.

I was thinking about trying a spray on...does anyone do that? What brand?

I was also wondering if I could use something like Walnut Alkyd Medium...this has such a soft nice gleam to it.

One thing I know I do not want to use is traditional varnish because I don't want to have to wait 6 months to varnish it. Maybe if someday I get a piece that I'm so thrilled with I will use that after awhile but I'm not ready yet.

Erilia
08-19-2015, 11:06 AM
My mom use a spray when she's done with her painting... I don't remember the brand so I'll ask her :biggrin:
She does acrylic painting though not oil, does that matter ?

TerryCurley
08-19-2015, 02:36 PM
Yes it does matter Erilia. You can put an oil product on an acrylic, but you can not use an acrylic product on an oil painting. Thank you the offer of finding out. They have some spray stuff at Hobby Lobby for oil paintings, I just never tried it.

Rathac
11-17-2015, 12:01 PM
Did you ever try the spray on glaze?

TerryCurley
11-17-2015, 05:58 PM
Nope I never tried it.

Rathac
11-18-2015, 07:00 AM
Does it do any harm to leave an oil painting unglazed?

TerryCurley
11-18-2015, 08:37 AM
I'm going to be watching for the answers on this from the experts. I asked it several times and the only answer I get is don't do it. Varnish it. I never did find out what harm it does to leave it unglazed.

WFMartin
11-19-2015, 04:47 PM
I feel that it is necessary to apply a final varnish to every painting that I complete. I would certainly not even consider showing or selling an oil painting that I had not varnished.

A final varnish for an oil painting should demonstrate these three attributes, at least:

1) It should protect the surface of the painting from dirt, stains, and abrasions.

2) It should impart a relatively even "sheen" across the entire surface of the painting, evening out the high and low (gloss & dull) areas of the painting.

3) It absolutely must be removable, and by the weakest possible of solvents.

Most oil painters observe these first two attributes, but many do not consider the third characteristic.

A finish must be removable because at any time it may be scratched, or damaged while doing its job of protecting the surface of the painting. I once had two paintings stick together, face-to-face, while being shipped in a shipping box. When they were separated, the varnish picked off of each of the paintings, harming the varnish, but not the painting.

All I had to do was to remove the damaged varnish, and re-varnish the paintings. I used Gamsol, one of the weakest of all Odorless Mineral Spirits. I removed the varnish entirely, and WITHOUT dissolving the surface of the painting. Very little paint showed on my cloth, as I removed the varnish.

Natural resin varnishes tend to bond, molecularly, with the ingredients in the surface of the oil painting, and "cross-link" with them. This makes it nearly impossible to remove the varnish, without also removing at least part of the painted surface, as well.

My choice of final varnish is GamVar, by Gamblin. It is a synthetic varnish, and it is easily removable by Gamsol (OMS), without harming the painted surface beneath it.

Synthetic resin varnishes, such as GamVar, can be applied only a few weeks after the painting has become dry to the touch, without waiting the usual 6 to 12 months for "curing time" of the painting. They are more flexible, and they "breathe", allowing the painting to continue drying beneath them, without the varnish forming cracks.

I absolutely never recommend the use of a spray can for applying varnish. It is much, much easier to create an even film of varnish by brushing it on, rather than spraying it on. The only painting that I ever had crack during my years of painting was one on which I had sprayed the varnish. The reason was that I had applied too much varnish by using the spray can.

Once, I also had the bad experience of having a fresh, brand-new, spray-can of varnish spew forth rust, and corruption upon the first touch of the nozzle. I could hardly run fast enough to get Turpentine to wipe the nasty stuff off of my painting. I never used a spray can again, and, as a result, I never recommend spraying varnish.....at least not to my friends.

TerryCurley
11-19-2015, 06:35 PM
Thanks for the info Bill. You are a wealth of knowledge.

WFMartin
11-20-2015, 12:32 AM
Well, there is one caveat to my recommendation of using GamVar varnish.

Because it is so IN-compatible with the materials contained within the surface of the oil painting [as it should be], it often tends to bead up (trickle, pull back, etc.) on the surface, as you apply it.

The way to counteract that condition is to first rub a bit of the varnish onto the surface of the painting with a lint-free cloth, or paper towel, using a scrubbing action, to break the surface tension that causes the beading.

Once you have done that, it is appropriate to apply a bit more of the varnish, using a brush.

TerryCurley
11-20-2015, 06:35 AM
I am going to buy some sponge brushes for putting on acrylic backgrounds on my paintings. Will a sponge brush work good for varnishing? My hope is to avoid those streaks I sometimes get from using a traditional brush.

WFMartin
11-25-2015, 10:03 AM
Terry, I have not ever used a sponge brush, so I don't know how it may work.