Fixing skirting with plugs - dark rings around plugs?

6 Oct 2009
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United Kingdom
Hi all,

I'm trying to fit some solid oak skirting using a screw digger and plug cutter - I've been able to cut the holes and screw the boards to the wall. The trouble is, when I did a test piece I fitted a plug and when I applied finishing oil (Colron) over the top of it I got a black ring show up around the plug! :S

Anyone got any ideas about this?

Thanks in advance,

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Try colron on the plug, and let it cure before fixing. Oil will always highlight deeper areas, gouges, scratches etc.
I reckon this is caused either by a ring of glue around the plug, or, more likely a slight burn mark from using the screw digger.

In your shoes I would get another test piece and try cutting the hole for the plug with various cutters, maybe a sharp flat bit, auger bit, etc. and see the results.

Steve :)
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dont forget the tannin in oak will react with the steel in screws and possibly the countersink if theres any moisture/dampness and cause black
you should realy be using brass or stainless screws especialy if its damp

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