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Forum topic by Cheapguy82 posted 02-11-2018 06:46 PM 931 views 0 times favorited 5 replies Add to Favorites Watch
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Cheapguy82

78 posts in 676 days


02-11-2018 06:46 PM

Topic tags/keywords: finish coaster question tip

I have been making some wood coasters, some engraved, and need some advice regarding a finish. While they all are currently done with some rattle can clear gloss stuff from the local hardware store, they seem to all be ending up with issues after a bit of use (see pics)...


Not all of them are end grain, but I am seeing this with them, too (not of these, but just to give you an idea of the stuff I’m talking about)...

Is there a finish that will be tough as nails, should I just go with some sort of oil and skip the gloss finish altogether, or is there another solution that I’m not thinking of?

Thanks!
Stephen

-- Stephen - Georgia


5 replies so far

View patcollins's profile

patcollins

1687 posts in 3008 days


#1 posted 02-11-2018 06:50 PM

Even just using wax on wood can give you something like this after sitting a cold drink on it.

The best way to avoid something like this with cans is something like this https://www.amazon.com/Thermos-Stainless-Steel-Beverage-Insulator/dp/B0000644AF/ref=sr_1_1?ie=UTF8&qid=1518374968&sr=8-1&keywords=thermos+coozie

With glasses would be an insulated glass.

That is the purpose of a coaster though, so your table doesn’t get damaged.

View tomsteve's profile

tomsteve

821 posts in 1362 days


#2 posted 02-11-2018 07:01 PM

is the ‘rattle can clear gloss stuff” lacquer?
personally i use oil based poly. the ones i have on my tables get used a lot and have been active for 5 years.
satin finish,though. that hides the wear they receive.

View Woodknack's profile

Woodknack

12369 posts in 2523 days


#3 posted 02-11-2018 07:13 PM

No finish is the best finish, or oil. The purpose of a coaster is to protect the tabletop by catching condensation. If you apply a hard finish the water will puddle and either run off onto the table or stick the coaster to the glass so when they pick up the glass the coaster falls back onto the table. It’s why coasters are usually made from cork or absorbant stone, stuff like that.

-- Rick M, http://thewoodknack.blogspot.com/

View LesB's profile

LesB

1815 posts in 3586 days


#4 posted 02-11-2018 07:34 PM

Rick-M makes some good points and one of my wife’s biggest objections to smooth topped coasters. Without using some sort of absorbent material on the top to deal with the moisture there needs to be a rim and or a engraved relief pattern on it to channel the moisture and leave a vacuum break between the glass, moisture, and the coaster.

Aside from those complaints I would suggest using a hard salad bowl finish from Behlen’s or General. They call it “Salad Bowl finish”. It is a wipe on product I use on, you guessed it, salad bowls and other small items. Four coats is impervious to moisture, alcohol, and oil….at least for several hours, and it is easy to wipe on with a soft cloth or high quality paper towel. I’m pretty sure it is a polymerized lacquer of some sort so once the can is open you need to reseal it and remove the air (use one of those nitrogen spray cans for that) or put in a smaller container with little or no air or a film will develop on the surface. I usually repackage mine into small canning jars.

-- Les B, Oregon

View Jim Finn's profile

Jim Finn

2678 posts in 3064 days


#5 posted 02-11-2018 07:43 PM

I have been using wipe on Poly on the cedar coasters I make. I have sold over 500 of them over the past three years and have had no complaints…yet. I like the idea of using an oil though.

-- No PHD just a DD214 Website> craftingcouple.com

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