Many of us use many types of model putty. Some even use my favorite, 3-M RED-MICRO Glazing Putty. I guess it’s called that because it feathers to invisibility on surfaces. Anyway, the thing is I have used pretty Much the whole Gamut of products out there and keep going back to the above named putty.
Why? Well, while using it I discovered a neat little trick, Taking a "Q"Tip I rubbed a little Lacquer Thinner on the surface of both parts. Let it gas out. Then apply the 3-M and shape with a wet clay shaping tool or your fingertip that you dipped in water. Different tool for different surfaces, right?
When you sand , ONLY WET Sand. Dry sanding is a No-No anyway in my book( Unless you’re working in wood that is!) Then, you will have discovered that you can use the "Q"Tip trick with anyone’s putty with awesome results !
Dry sanding is okay if you want to buy sandpaper by the gross [8-|]
Actually, when I have to sand off a lot, say a thick putty spot, and I use 150 or 240 grit, I do not wet sand- the dust particles can be blown off pretty easily. Yes, I do have to go to those grades once in a while (I am building a Williams Bros kit right now).
I’ll just stick with CA, black Sharpie, and wet sanding from 1500-12000 grit to make all of the black from the Sharpie disappear for small gaps and seams. For larger ones I just work a little Apoxie Clay in there and shape, smooth, and level with a damp Q-tip and maybe a wet toothpick when needed…no sanding required. [H]