I got a 2.5 gram pack of Atom Adhesives AA-BOND FDA15 epoxy
which cost me just under $10 including USPS shipping to try to coat some magnets similar to what @Benbeezy
showed in his VIDEO
I picked that particular epoxy because it is low viscosity and was developed for bonding and coating
applications. The epoxy is a thin liquid and I used a toothpick to "paint" the epoxy on the magnets.
I just finished my first try with this epoxy and I coated 4 parylene coated magnets and 3 regular nickel coated ones. I am now waiting for them to cure which will take 24 hours at room temperature. I expect the back sides to need another coat.
First, before I describe what I did, I can tell you that magnets suck to work with. Get them a little too close to each other and they jump together.
I don't know yet if this idea is even going to work but I will describe what I did. I used wax paper to lay the nickel magnets on to cure as @Cassox
suggested in another thread
and parchment paper for the parylene coated ones.
I wiped each magnet with rubbing alcohol to try to remove any oils and to clean them up. I opened a corner of each side of the little pouch of epoxy and guessed at the ratio of epoxy to hardener. The website for the epoxy states 100:20 / Resin:Hardener so I tried to add 5X as much resin. This may not be the best way to do it but I didn't want to mix it all up at once especially since this is just a test. There is not much epoxy in the 2.5 gram pack but it should do a lot of these tiny magnets if it doesn't harden up before they are coated on all sides. I used an impulse sealer to reseal the pouch ends after I was done. I only used a tiny amount so far.
I mixed the epoxy up on the parchment paper using a toothpick and placed the magnets on the wax and parchment paper for coating. I used the same toothpick to pick up each magnet and dip it into the epoxy. Then I placed the coated side down on the hopefully nonstick surfaces and painted the tops and sides. The epoxy is thin so it coated them easily.
I'll update this thread when I see if the epoxy cures. So far it looks like @ThomasEgi
's magnet levitation device
would make this a lot easier (one at a time) and the magnets might be able to be coated and cured in one pass.