I signed up to their Paint Club (free to sign-up) and received my $20 voucher via email ~12 hours later. Used it in combination with this gift card in-store and it ended up being cheaper than Bunnings.
Terms & Conditions:
Promotion dates: 17th March – 14th April 2022.
To be eligible, customers must join Paint Club, either in-store at participating Inspirations Paint stores, or online before Thursday 14th April 11.59pm AET. By signing up to Paint Club, customers are agreeing to the Terms & Conditions of Paint Club.
Sign up period for new Paint Club members is between Thursday 17th March and Thursday 14th April 2022. Vouchers may take up to 24 hours to be emailed and are valid from Thursday 17th March and expire close of business on Saturday 14th May 2021.
Voucher is valid only on retail products at retail (Paint Club) prices. Excludes trade products, account and Paint Edge pricing.
Present the voucher code in-store by showing the email to staff and instantly get $20 off in one transaction at any participating Inspirations Paint store. Voucher is not redeemable for cash and must be used in one transaction with no change given for unspent funds. Only one voucher can be redeemed per transaction. Vouchers are transferable but limited to one voucher per Paint Club customer. Vouchers cannot be redeemed online and must be redeemed in-store.
Thanks OP!