Pin holes in west system fiberglass

[Tootall]

After using west system resin/epoxy to finish body seams, Sanding, and applying high build primer, have many pin holes. The contours are good, just need to fill the holes for more primer and block sanding. Any suggestions on filler for these. I fear standard body filler will not go into these tiny holes.

[wbulk]

If you are using Feather Fill G2 or Slick Sand as a primer, before it sets up you can use a match stick or something small, dip it in some left over primer and dab in on the pin holes. It works pretty good to fill them.

[first time builder]

3M makes (under the Bondo name ) Professional glazing and spot putty Item 801. It is available in many auto parts stores. It is a 2 part system. It smells like bondo but is very smooth. I have had very good results with it for pinholes and small chips and scratches. I always prime over it , unless I am using a sealer over it. I also have used the method of extra feather fill dotted in the holes. Unless there are just to many of them.

Kenny

[Tootall]

Too many to fill with the spot method, glazing sounds like the way to go. Thanks

[CHOTIS BILL]

One trick you can do with Bondo is thin it down with polyester resin until it is thin enough to go into the holes and still thick enough that it won’t run.

Bill Lomenick

[Blue MK3]

I'll suggest the technique that I use for filling pores in wood when making a gun stock. It's commonly used by stock makers. After the final contours are complete, apply some thinned filler/primer/bondo, whatever you're using. Then hand sand the surface lightly with fine (400-500) wet or dry paper. The idea is to make a slurry of the material rather than dust. Work over the area lightly where the pores exist, forcing the slurry into them. Let dry/set up, then lightly dry sand the area to remove any material on the surface. Repeat as necessary.

[first time builder]

Thats why I use the 2 part glazing putty its very thin. And is very easy to sand after. It works much better than the single part glazing putty, and doesnt tend to shrink like single stage putty. TOOTALL just make sure there is no dust in the pin holes, or putty will glide over the pin holes.
Kenny

[tcoon]

I used metal glaze (evercoat?) mixed a Little "hot" (extra hardener) applied very thin with a razor blade. Little sanding, and filled holes very well. Make many small batches rather than one large one. Use lots of paper plates as mixing palates! Razor blade is a great tool...use it a lot!