Not Retiring Enamels After All

Real life has been in the way bigtime, it’s been three months, to the day, since I had a chance to post, but finally I have the time and something important to look at.

Last year I posted a speculative point that acrylic paint technology had almost reached the point that it was worth retiring enamels altogether, for their toxicity and stink. How many of us spray outside to keep the fumes from offending the family? And mortgage our health in any case, as unless we can afford a proper industrial respirator, we’re going to breathe in at least something of the atomised hydrocarbons or whatever other noxious fumes our airbrushes emit.

I have spent most of the last year studiously avoiding enamels, my last enamel job is awaiting completion, and that last camo shade will probably go on with acrylic anyway, just like the topcoat. But where metallics are concerned, acrylics are just not up to snuff yet.

Reviews of the original Tamiya range many years ago reported a granular effect from their silver, and though their paints are now better made, more finely ground or whatever, that granularity is still with us. Add in difficult conditions of temperature and humidity and you can have a mess.

I recently set out to do the natural metal parts of a whole line of Phantoms, and Tamiya acrylics only wanted to spatter and dry like pebbledash paving. Next I gave the Talon brand another go, but I don’t think I’ve encountered a more unfriendly and delicate formulation. I ended up with five sets of tail fins to sand clean for the second time, as the ‘gradual build up of mist coats’ technique was gradually building up little more than … pebbledash pavements.

In frustration (and as I had an hour with the family out) I pulled out an ancient bottle of Model Master Chrome Silver. There was a tiny bit of sludge at the bottom and I was about to bin it, but decided to give it a go anyway. Tamiya X-20 enamel thinner reconstituted it perfectly and it went onto the engine areas of five Phantoms without a hitch, and without the spatter effect that has had me convinced lately my airbrush’s #3 needle needs replacing.

I should have just sprayed everything in enamel and given the Talon a miss, then the whole job would be done. After masking I can do the darker shade in acrylic, Tamiya Aluminium and Gunmetal are far less temperamental than their Chrome Silver, but for the bright base it turns out there really was no alternative. I’m not saying the Talon paints aren’t excellent, but they’re a technique that takes practice, and a patient hand, and I hope one day to have the chance to find my feet with it.

For now, I find myself thinking again about that fumehood setup and respirator for the hobby workshop ("mancave," is a common term for it, but that's sexist, there are plenty of great female talents in the hobby) that's out there on the horizon. Enamels really do flow on so beautifully… It’s a pity they’re poison.

Now That’s What I Call Shelf-Life

 I have rarely had cause to need gold paint. I have always fancied doing that gold-painted F-16, Sioux City Special I believe she was called, I even have a kit and decals lined up for the day I have the time... The chance... Somewhere to put it... But the odd gold detail might call for having gold in stock. I have a tinlet of Humbrol #16, Gold. I recently needed to open it for a few dabs of gold to visually blend in some gold foil I was applying, and sure enough, there it was, in the box at the back of the drawer. I really don’t remember if it was ever opened to do a job, but I am sure it was bought to do the gold detail work (engine accents, IIRC) on a small kit of the Honda CB 1100R motorcycle, by a firm called Crown. I bought that kit around Christmas 1982, it may be the oldest single article in my stash (still unbuilt). And by default, that means the paint is now around 27 years old. (The pic above is a new tin, I can’t seem to lay my hands on the old classic…) It wasn’t even thick in the tin. I gave it a shake, opened it and stirred it for thirty seconds, and it was good to go. When that paint was manufactured, that expression wasn’t even in use, nor were in the pipeline, 24/7, on track or my bad. That’s what you call shelf-life! Maybe the pigments weren’t as finely ground in those days, and the available ranges were smaller, but the chemical balance of the paint in the tin makes for a virtual time-capsule: so long as the balance remains within certain margins the mixture should remain viable forever. Of course, there are other tins that go hard while you look at them, and I had a bottle of MM enamel whose contents turned into a strange, rubbery substance without ever being opened, or maybe only for a tinting dab, but this is where chemistry meets philosophy. The same thing happened recently to another bottle, much newer, something to do with failure of the foiled card seal in the cap, I think. Folks have been complaining on other forums about this and other shortcomings of the Model Master range, lately, which is a pity as it’s really good paint, just let down at times by packaging issues (and accuracy issues, like the identification numbers of the RLM 82 and RLM 83 shades somehow getting reversed when the labels were printed… Or their Dunkelgelb being a bit on the dark side…) For the moment, I’m very impressed with Humbrol. Of course, the delicate balance of chemistry in the tin has been disturbed now, and the next time I look at it, it may have congealed, disintegrating like a vampyre whose coffin was opened before dusk. I guess we’ll see when it comes time to build that F-16 (unless I’ve graduated to Talon Acrylics by then...)