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  #1  
Old 11-12-2016, 09:29 AM
Dflan83 Dflan83 is offline
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Default Cleaning asphalt off coins

Hey everyone I've noticed that many of my wheat penny finds from the fairgrounds are embedded in Rocky asphalt. There is almost a black tar like substance on them. How do I clean this off.

So far I've put a few pennies in a jar of distilled vinegar but it's not doing much
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Old 11-12-2016, 09:57 AM
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You need a strong organic solvent like MEK {methyl ethyl ketone} or dichloromethane, used as paint strippers. Look in the paint section of a hardware store.
Soak the coins in a sealed container.
If the asphalt layer is thick, you'll probably need to carefully scrape off a bit then soak again, and repeat until its all gone.

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Old 11-12-2016, 10:28 AM
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You might also try using a rag and a little gasoline (use some rubber gloves if gas bothers your skin). As mentioned in the previous post, you may also want to toss a few pennies into something (can or jar), submerge them, and allow them to soak for a few hours, maybe even overnight. Then see if the tar will come off easily, when wiped with a rag dampened in the gas. It's worth a try...

⚠️ Just use caution, be careful, and don't do anything to get hurt.

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Old 11-12-2016, 11:54 AM
Dflan83 Dflan83 is offline
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Thanks guys I'll work with the gasoline
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Old 11-12-2016, 12:08 PM
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Originally Posted by Dflan83 View post
Thanks guys I'll work with the gasoline
Let us know if that works. Seems like it should remove tar ..

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  #6  
Old 11-12-2016, 12:39 PM
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Diesel fuel or kerosene is what I use to desolve road tar off my cars, works like a champ and doesn't hurt paint either.

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Old 11-12-2016, 01:33 PM
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Bug-Off and Tar-Off like products may help as well as Goo-Gone and other sticker removal type liquids.
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  #8  
Old 11-12-2016, 08:39 PM
JOE319 JOE319 is offline
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all ive ever done is boil coins in salt water....it has worked great on many things on coins including epoxy
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  #9  
Old 11-13-2016, 07:11 PM
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Tar is oil based so the most common and safest solvent would be mineral spirits (paint thinner). Other safe solvents would be diesel fuel, naptha, kerosene. The least safest is gasoline. I would just soak it in paint thinner for a day and see what happens. You can always leave it in there longer.......

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Old 11-14-2016, 06:36 AM
jonnied1 jonnied1 is offline
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Originally Posted by donbock2015 View post
Diesel fuel or kerosene is what I use to desolve road tar off my cars, works like a champ and doesn't hurt paint either.

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+1

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Old 11-14-2016, 09:54 AM
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Originally Posted by khouse View post
Tar is oil based so the most common and safest solvent would be mineral spirits (paint thinner). Other safe solvents would be diesel fuel, naptha, kerosene. The least safest is gasoline.

I realize that gas is probably the least safest solvent, based on it's flammability characteristics, but likewise, I was trying to suggest something that would be readily available around most households. I was also giving Dflan83 credit, for being able to soak a few coins without blowing his head off. Plus, I can't see that being any more dangerous than filling up the lawnmower or the weed-whacker, for that matter.


⚠️ Just use caution, be careful, and don't do anything to get hurt.

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Fisher F75, Garrett AT Pro, Pro-Pointer, Whites TRX, Jolly Roger Phones, Lesche Digger, 31" Sampson, 31" Relic Hunter, RTG Scoop
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  #12  
Old 11-14-2016, 12:15 PM
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Default Easy and Safe

WD-40 will dissolve tar. Soak it for a bit to soften larger accumulations.

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  #13  
Old 11-14-2016, 09:57 PM
khouse khouse is offline
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Originally Posted by Reef Runner View post

I realize that gas is probably the least safest solvent, based on it's flammability characteristics, but likewise, I was trying to suggest something that would be readily available around most households. I was also giving Dflan83 credit, for being able to soak a few coins without blowing his head off. Plus, I can't see that being any more dangerous than filling up the lawnmower or the weed-whacker, for that matter.


⚠️ Just use caution, be careful, and don't do anything to get hurt.
Don't get me wrong - I've used gasoline many times as a solvent. Just giving some other solutions which of course will take longer to work.

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  #14  
Old 11-15-2016, 09:03 AM
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Originally Posted by khouse View post
Don't get me wrong - I've used gasoline many times as a solvent. Just giving some other solutions which of course will take longer to work.
☮️ No problems here - all is kool !

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Fisher F75, Garrett AT Pro, Pro-Pointer, Whites TRX, Jolly Roger Phones, Lesche Digger, 31" Sampson, 31" Relic Hunter, RTG Scoop
Oldest Coin (1910 Barber Dime), Best Find (CW 3-ringer), Strangest Find (Urn Lid)
Clad Count (1933 coins)/($190.01)

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