求翻译：主要项目为钢制栏杆、内墙、顶棚。为了提高油漆及涂料工程的质量，材料一经监理工程师批准，不得随意更改；使用的产品必须有合格证书，且有制造厂商关于配套、兼容的说明。清理好基层，选用合格的材料，同时加强检查。材料的品种符合设计要求，并符合现行的材料标准规定。材料进场后，进行验收。使用的稀释剂与涂料配套，不得随意掺兑，颜料性是什么意思？

Major project for the steel railings, walls, ceiling. In order to improve the quality of paint and paint work, a material approved by the supervising engineer shall not be altered; use of the product must have a certificate, and there is supporting manufacturers of compatible instructions. Clean-up

Major projects for steel railings, internal walls, roof. In order to improve the quality of the works paints and coatings, materials, approved by the Supervising Engineers shall be free to change, the use of products must have a certificate of competency on ancillary, compatible with the manufacture

Major project for the steel railings, interior walls, ceiling. In order to improve the engineering quality of paints and coatings, materials management engineer approval shall not be arbitrarily changed; uses the product must have a certificate of competency, and manufacturer instructions on matchin