The radio and letter-drop campaign aims to turn opposition to the federal government's proposed 40 per cent mining "super tax" into votes at the next election.
Postcards will be sent to voters in Labor-held seats asking them to reject MPs who support the Rudd government tax-grab.
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The mining tax is deeply unpopular in resource-rich Western Australia, which has Australia's only Liberal state government and an 11-seat margin over Labor at the federal level.
Anger is already bubbling over WA's share of GST revenue, which is 68c on every dollar earned - the lowest proportion of any state since the system was introduced.
Labor politicians targeted in the state Liberal campaign include Foreign Minister and Member for Perth Stephen Smith, Brand frontbencher Gary Gray, Fremantle MP Melissa Parke, Hasluck MP Sharryn Jackson, and high-profile state MLA and Canning hopeful Alannah MacTiernan.
The postcards will ask voters to "Reject politicians who don't stand up for you", saying the "$12 billion" tax will risk the livelihoods of "up to 500,000 Australian families".
Recent WA polling suggests Labor faces a wipeout in WA, and could lose two of its four seats.
Hasluck would be lost, Brand - which Labor holds with a 6.1 per cent margin - would be too close to call, and Perth would be marginal, according to a Westpoll survey released on Saturday.
Only the traditional Labor stronghold of Fremantle would be safe, according to the poll.
