Scrolls and their exotic variants (except for upgrade and enchantment), frozen carpaccio and mystery meat, all bomb variants and dewdrops should be the only items that can burn (at least the ones I can see in the journal).
The way to deal with traps back in the day was to throw your waterskin as it was completely indestructible.
This is because everything fire related happens at the start of a turn and there is nothing that can (except time freeze) augment bomb throwing speed.