求助！地板打磨问题。floor sander 打不动。。。

davidan

The sanding effort is not enough. For your situation you should expect to shave 2 or 3 mm thickness to get an even surface with all bare wood exposed for coating.
It's your own judgement if it's safe to reduce the thickness of this floorboard. Some floorboards perform as substrate which cannot be too thin.
By the way you should stick to using the drum sander till the floor being leveled and bare wood exposed. The edger won't create a level surface. Be patient. As you never done this before you can stick to the 120 grit paper. You may run many passes to achieve what you expect.

xiaoxiaomt

看着难

patriciarui

davidan 发表于 2014-1-9 15:33

The sanding effort is not enough. For your situation you should expect to shave 2 or 3 mm thickness  ...
thank u so much for ur advice.
现在情况是sanding实在太累人了，钉子 putty还得来一遍
如果直接上satin的漆会掩盖一些吗？还是会更糟糕

patriciarui

lvr 发表于 2014-1-9 12:19

打磨前为什么要上油呢？
前任房主应该是整体打磨抛光过但不知道为什么掀开地毯发现只有四周油过 中间没有coat的痕迹 就是原木色

33857401

其实真的没必要DIY，除非你花很多时间自己慢慢研究，不然真的不出效果，虽然澳洲上强人如云，总有很多秀DIY相片的，但是实际效果，真的只有自己知道，很多都是打碎了牙往肚子咽，不好意思说出来。

lvr

patriciarui 发表于 2014-1-9 17:23

thank u so much for ur advice.
现在情况是sanding实在太累人了，钉子 putty还得来一遍
如果直接上sati ...
没经验，最好不要stain，很难的。

背包客

patriciarui 发表于 2014-1-9 17:23

thank u so much for ur advice.
现在情况是sanding实在太累人了，钉子 putty还得来一遍
如果直接上sati ...
千万别这么想，上漆不会掩盖任何瑕疵反而会无限放大
都干到这个份上了咬咬牙坚持下来吧。。
上了漆以后还要用更细的砂纸轻微打磨一下，再上漆再打一遍。至少2遍漆

乐享d天涯

背包客 发表于 2014-1-9 18:16

千万别这么想，上漆不会掩盖任何瑕疵反而会无限放大
都干到这个份上了咬咬牙坚持下来吧。。
上了漆以后还 ...
如果上漆前打磨的不够细，2遍漆是远远不够的，我楼下一个房间上了4遍漆，还觉得不够亮。楼梯的地方正好碰坏了一点，所以上了第5遍漆，才有很亮的感觉。

davidan

patriciarui 发表于 2014-1-9 17:23

thank u so much for ur advice.
现在情况是sanding实在太累人了，钉子 putty还得来一遍
如果直接上sati ...
It's because you did it in wrong way. It is the drum sander to do the job not the edger. Drum sanders are not as hard as edgers to operate. You only need to use a little strength to pull the sander backward to make it cut into the wood. This sander is not designed to cut quickly as long as you keep it moving.
The edgers perform as disk sanders. They cut very quickly. Since it is low profile you will have to bend down to hold it. It's very exhausting so you should only use it in the edge areas.
You are unable to get a flat floor from an edger. It's the drum sander to do the job.
The 40 grit paper is used to break the old paint. Old paint is the toughest part to remove in the work. You should run the 40 grit in both 45 degree diagnostic directions to initially break the old paint, then run it follow the grain to remove most of the paint.
The 80 grit is to remove the little remaining paint and make the floor level. The 120 grit is to make the whole floor even and fine.
The common sense is that the 80 grit and 120 grit works good on timber. The 120 grid won't work on a painted surface.
From your figure 1 and 2 you even didn't get the old paint stripped.
As the timber is now exposed you may get the drum sander back and keep 120 grit sanding over the floor till you get a totally different result.
Your current floor still appears in different colors. This likely is because the old coating wasn't removed totally. You cannot apply another coating as there is no clue if the new coating will stay. You have to sand all the floor even. From your last image the quality is far from a ready-to-paint surface.
As others said no coating can make up a poor sanding work.
The overall trick is to be patient. You only ran total 9 passes over a painted floor. It's too rush to get a conclusion.

Mr.Yuan

我本来也打算打磨的 结果后来决定在上面铺laminate 用了3天时间搞定整个房子的.