PhilP
From what i have calculated on the weight of pla i was printing on, the costs would be 20Euro for 6.2 meter/20,4 foot
My printer is busy for 12 hours to print 1.2 meters/3.9 foot, if, big if, everything works oke.
My bed size is 35cm x 35cm/~1 foot by 1 foot.
If printed in abs (lego plastic) the price is the same, but very very difficult to print for me.
In pla plastic i print 3% larger and cure it in the oven (at 70c/158f) to make sure it will stay "measurement fixed" and not shrink or wrap.
That would be a nice experiment, but i am going to play "dirty":
I will let them sink in a bath of wood stain for 6 hours to a day, and create a vacuum
I think untreated that those small pieces will not last 10 years, (especially embedded), if i look in my canal at the wood(much thicker) after 30 years there are some deteriorations.
Untreated mdf outside, it will thicken up and deteriorate within 2 years, how ever there is mdf and mdf.
Sinds a year or ten there is a mdf that had a special treatment, with very concentrated vinegar or something similar.
They are changing chemically the cell structure or the cellulose in the wood itself? cant remember precisely anymore.
They say it wil have a lifespan of 30 years plus...?
I have a suspicion that mdf used for your model is not the "regulair" mdf but possibly enhanced?
Sorry to say i am not familiar with rattle can.(yet)
As far for my experiments/projects i would like to do some more before i decide what is going to be it.
De grootspoor has sometimes some secondhand stuf or chinees plastic rails?
A lot to explore, first in line with cold rolled steel strips or bended steel rap.
Btw as you look close at those pictures i posted you can clearly see that i need to change/work on some dimensions.