Tamiya acrylics are solvent to Windex or anything containing ammonia. That should have little or no impact on a cured lacquer basecoat...but as the instructions always say, "...test first on a hidden or non-critical area."
(In point of fact, I've even had success using Windex to clean 'fresh' Tamiya acrylic from older and fully-cured Tamiya acrylic...but it takes patience and a light touch. On lacquer it should be a breeze...but the 'minimal' amount required is always best.)