Well, the nibbler cleaned up well with just a vigorous tooth brushing with Isopropyl alcohol , removed all the dirty grease and gunk ( must oil it before it goes into the tin snips roll) it worked lovely on some about 18 gauge brass Tried it on.
The ruler was extremely dirty but I googled how best to clean it without removing the India ink markings or warping the wood and the concensus was oxcilic acid, and if you can't get it neat then Bar Tenders Friend which is basically a mix of citic acid and oxcilic acid in powder form. I added just enough water to make a paste and lightly scrubbed it with a old toothbrush. It worked a treat!
I've given the wood a couple of coats of Matt acrylic varnish to stop it getting manky as easily. With some I've gloss varnished ( as when new ) I've found if used as a scale in photos the glare from the flash or a daylight bulb causes the markings to be unreadable.
atb
tom
The ruler was extremely dirty but I googled how best to clean it without removing the India ink markings or warping the wood and the concensus was oxcilic acid, and if you can't get it neat then Bar Tenders Friend which is basically a mix of citic acid and oxcilic acid in powder form. I added just enough water to make a paste and lightly scrubbed it with a old toothbrush. It worked a treat!
I've given the wood a couple of coats of Matt acrylic varnish to stop it getting manky as easily. With some I've gloss varnished ( as when new ) I've found if used as a scale in photos the glare from the flash or a daylight bulb causes the markings to be unreadable.
atb
tom
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