所以我们糖用&洗天花板一样厚的油脂和污垢,然后用砂纸磨它把底漆然后把乙烯马特和它有裂缝和一些小的领域开始削皮。这个上限是去年画了超过20年前它从散热器上面有泄漏。也有一种光泽有点拉克尔和温家宝就从之前湿它糟透了像鱼。也有锈在集群通过补丁。我真的困不没有天气砂裂缝和放油底漆基于&然后试着马特。不没有泄漏从楼上前一段时间是造成天花板这光泽在捕获。

Thank you all for your advise I sanded it down & put 2 coats of oil based undercoat on it & it's perfect now . Just never came across lacker on the ceiling before . It has certainly bin an Educational experience lol .