I use large amounts of epoxy in my work. Over the years, I’ve found
it more convenient and considerably less expensive to use a good
commercial paint stripper rather than Attack. They both contain the
same active ingredient, methylene chloride, but, for me at least a
visit to the hardware store is quicker and easier than ordering this
stuff from a supply house and payig freight on a Hazmat material (if
they follow the law).
By trial and error, I have settled on KleenStrip brand, the Premium
Sprayable version. It is by far the fastest acting.
Everyone should keep in mind that methylene chloride is a very
powerful carcinogen, so follow the directions EXPLICITLY. This is
one material that commands respect not only in use but in disposal.