Re-japanning a plane
Ah, is there any more controversial topic in antique tool collecting than whether or not a tool should be re-japanned? Well I really don't care, because I'm not really a tool collector for tool collecting sake, I'm more of a woodworker who buys old tools to put them back to work. Plus I consider it an honor to bring an old tool from the graveyard of Grandpa's garage into my shop. So the last thing I want is to have a perfectly usable tool with only 5 -10% japanning remaining on it. It simply looks like crap. So I'm going to show you how to properly re-japan a tool.
I bought an old No 7 off Ebay for about $30.00 a few weeks ago. While the plane was in good condition, most of the japanning had flaked off. I really didn't want to keep the plane looking like that so I decided to re-japan it. The first I did was to take the bed and scrape away as much of the original paint as possible with dental picks. In order to have a nice finish with japan paint, you need to have the surface as clean as possible.
Next I take advantage of the summer months and place the bed and frog in the sun to bake for a few hours. Back in the day, old black japan paint was baked on in an oven to seal the surface. There's no way I'm sticking tools in my wife's oven so I let mother nature heat the tool up for me.
I buy Pontypool black japan asphaltum paint from a company called Liberty of the Hudson and use artist brushes to apply a very thin coat on the bed. Apply the paint as thin as possible and don't try to use glue brushes as their bristles are too thick. If you do, you'll have thick brush strokes all over the plane's surface and it'll look terrible. I apply four coats while the bed is in the sun, waiting about two hours between coats. The japan paint will go on really oily and it will look strange, but it levels out as it dries. It's important not to apply the paint too thick. Four thin coats is much better than two thick ones.
If you plan on re-japanning a plane bed, re-japan the frog as well so that the colors match.
After the paint dries I let it sit for two weeks to cure. Not two hours, or two days..... two weeks. You have to make sure that the japanning is completely cured before you attempt to finalize it, otherwise you will rub off the paint. Once the paint is cured, I rub 0000 steel wool on the body to knock off the glossy sheen. I also rub off some of the paint from the high spots of the bed like the plane number and patent dates. It just makes the tool look more authentic. Then I use a product called Kramers Antique Improver and wipe it all over the plane to bring out a satin shine and protect it from rust.
You may ask, why not just use engine enamel spray paint? Well I have seen tools that have repainted but they never look like real japanning. Japanning gives you the texture of a thick coating that can not be duplicated by simply grabbing a can of Krylon and spraying it with several coats of spray paint.
When the plane is done it looks fantastic. So much so that some people may never be able to tell that the tools has been re-japanned. That's where it gets hairy. If you re-japan a tool and plan on selling it, you need to disclose the fact that the tool has been enhanced, otherwise that's a form of fraud. The value of an old tool often depends on how much of the original japanning remains and some tool collectors will pay big bucks for tools that are in mint condition. So bare in mind, it's your tool, do with what you want with it, but if your knowingly misrepresent the conditions of the tools you sell, then you will be considered a fraud.