OK, another question.
>
>When using epoxy, how long should one wait before putting a second layer
>of epoxy in place?
>
>For example, if using 30 minute epoxy, you have 30 minutes of 'working'
>time, about 4 hours of 'setting' time, and about 24 hours until 'full
>strength' is reached.
>
>When putting multiple layers of epoxy in place (for example, first
>gluing the fins to the body tube, then later adding a fillet), how long
>should one wait between layers?
>
>David Erbas-White
If you apply subsequent layers before the underlying layers have fully cures, it is supposed to form a chemical bond between layers. If it is fully cured, then it is a mechanical bond. I believe you can find the information on West Systems web site (and other places)