Check with a chemist / pharmacist or someone who knows chinese and some chemistry
Btw, I asked about TSP as interweb suggests to clean with it first before sanding. Did you say no need to clean it before sanding?
@Cornmeal Thanks for the explanation about sand paper. I went to a paint store near my place and they seem to have sand paper in different colours, not just black. If it is the same grit, will it matter what colour the sand paper is?
Also, further reading online seems to strongly suggest after sanding old oil-based paint, to use a primer before applying water-based/ latex paint. Is a primer really necessary in this situation and does it matter if the primer is oil-based or water-based? I checked and Nippon Paint only has water-based primer.
Really appreciate your advice!
After filling in the cracks in the seams of my wooden door with putty, and sanding the putty with 150 grit, just read the label on the putty container and it does not mention for wood, just mentions cement plaster, concrete and bricks. Guess it is meant for wall? Did I just mess up and have to redo by buying a wood putty? Or is putty for wall ok to use for wood too, even if it does not say so on the container?