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A suggestion next time use lass screws and attach things together with dowell pins and glue.
that is a great project but instead of just wax I would have used tin cloth mixture it is a bit more durable but all and all well done.You can find out how to make tin cloth on instructables.
A silly question but what does the hammock weigh? Do you use this as a field hammock or just in the yard?
Heinz are sold states side but are regional not national living in pa they are common out side pa not so much.
These are covers not sprays they are meant to protect from spills pets and such the sprays are not what they once were.
I would suggest a simpler solution a water proof cover they sell them in places like Target Walmart and on line.
Look up tin cloth the candle and dryer works but it is not a great solution unless you are dying cloth and want to use several colors on the same cloth.
This is a great article and a lot of information not found else where thank you. Another great place to find information on organic gardening is a web site called You Bet Your Garden run by a gent named Mike McGrath he also has a weekly radio program of the same name on NPR (National Public Radio).
Cider vinegar works well also as does grape juice
Have you thought about converting it to charcoal then taking it and mixing it with say cassava or other binding agent and making charcoal briquettes you can also mix the charcoal (biochar) into the soil to improve it. Charcoal making requires little in the way of equipment.
The same thing happens with Brazil nuts.
As a chief try creating a food bar/nutrition bar/protein bar that is cheap taste good and does not contain large quintiles of sugar.
Growing medium is what you grow the plants in the two most common are pearlite and rock wool. There are more but these two are the easiest to use and easy to find at most garden shops and places like home depot and lows.