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  #1  
Old 09-13-2017, 09:06 PM
Hispeed Hispeed is offline
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Default Removing old coating

I have a large (45x25) live-edge slice from a customer. It was used as a hanging sign before and appears to have a thick layer of polyurethane on it. Or whatever material was used to layer on a thick, clear, gloss coating in the 80's or 90's. I'd like to just machine it off and create a new surface for carving. Are there any pitfalls to this? Any particular bit, speed, feed, etc., that you would recommend? I'll have to take off at least 3/8" or so.

Thanks in advance!
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  #2  
Old 09-14-2017, 12:07 AM
CosmosK CosmosK is offline
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finishes are basically plastic when cured, so I'm not sure why it would be a problem. Machining plastics: try not to melt it.
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  #3  
Old 09-14-2017, 12:23 AM
Brendt Brendt is offline
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I would use whatever bit you use to mill your spoilboard with similar settings. I am sure that it will cut just fine. Adjust the stepover and cut depth for the final pass so that you get a nice finish.
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  #4  
Old 09-14-2017, 01:13 PM
Art Mann Art Mann is offline
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The material is probably table top epoxy. As already mentioned, it ought to be easy to machine away. Just watch out for the bit gumming up.
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  #5  
Old 09-25-2017, 09:21 PM
Hispeed Hispeed is offline
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Sorry for being away so long....Thank you for the replies! I'll give it a shot and watch the epoxy fly!
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