Coating a Lilypad in resin

Is there a reason you want to use resin as opposed to a product made for the purpose?

Conformal coating is what we use in the electronics industry. One advantage of this is that some types of coating are made to be removable with solvents, which would allow you to modify or repair your board after it was coated.

Simply searching for "resin" in Instructables provided several good results. I would recommend using Resin as well. I honestly can't think of any other way to cover a circuit board, and have it clear at the same time.

http://www.instructables.com/id/USB-casting-in-transparent-resin/

Also, if you have a need for a lot of resin, here's another good link: http://www.instructables.com/id/[Video]-Mixing-Polyester-Resin/

One last thing. Different types/amounts of sanding will result in the resin becoming foggy. If you don't want this, both links discuss how to make it clear.

I've had some luck with these two products: liquid electrical tape and polymorph pellets. They are cheap and easy to use.

The pellets can be melted with a low heat and molded directly onto the circuit board. The liquid electrical tape adds a degree of waterproofing and extra knock protection.

Washing machines can be pretty hash. Have you considered a quick release system for the main board? It might be easier than trying to make it rugged and waterproof?