I used heat lamps under the raised part of the front deck. They were moved about every 15 minutes. The idea was to "pump" air in and out of the balsa core by cycling between warm (hot) and cold. This was also done for two months. My electricity bill was 4 times higher for these two months than it was for the same period last year. The material costs for the repair work was about $200. The increased heating bill was twice that. That is my yellow silicon "frosting" spatula in the upper right. Highly recommended because hardened epoxy can be removed by simply flexing it.