rmac348

so im converting my ultra lx comp n am wondering how i can fill in all the excess holes i got in the chassis...im tryin to make it as water resistant as possible. its a stock aluminum chassis...any help would be great. i want it to be durable as well as look good!! also whats the best way to mount my ESC? Double sided tape? Double sided foam tape? Glue? what? thanks for the help.