Well, with suppressive fire, the most damage you could do is base damage.
So the wall rolls its reaction + edge and gets zero hits.
But this stuff is more structure than armor, so base of 6p is enough to do damage, and the burning will continue each turn, diminishing by 1p every two turns to account for the two shots expended.
rolling the dub armor to check for how much damage is happening each turn.
so, 5Ps on the burn for the first turn and another 5Ps for turn two, which is enough to bust it.