I live in a 1920s red brick house that has white paint splattered and dripped all over (we're guessing from very poor paint jobs of the trim). We don't know how old the paint is but we have tried almost every type of acid/chemical including diedrich606 which was supposed to be able to remove paint from anything. We cannot paint the whole house white as it is part of the local historic district (we have already been told no). Any other suggestions out there that are surefire ways to remove old paint from brick? Thanks!