Model Filler

Tamiya white fine putty. Available at hobby shops and carried at Hobby Lobby....use 40% off and it's a deal. Best putty for plastic models.

Thanks, Dave.  It adhere's well to the flat plastic?

Lightly sand the ejection pin mark, apply putty in thin layer. Putty has a solvent that blends with plastic. 

I second the Tamiya white putty.   Easy to work with.   I used to use Squadron green putty.  It was hard to apply, went on chunky, dried before you could smooth it,

Bob

There's a new putty (relatively) on the block...

Deluxe is a U.K. brand....WIDE range of outstanding materials for the hobbyist. 

Deluxe Materials Link

Available through several U.S. distributors now.  We (LHS) keep finding new 'favorites' in this line among our customers in the R/C, static models, model railroading, etc. areas.  This putty is just now catching on....positive comments.....favorable reviews in trade magazines.

Competitively priced, too.

FWIW, always...

KD

Thanks for the suggestions!  

My experience has been that Perfect Plastic Putty is great for filling thin seam lines but does not work well when you need to putty anything more extensive than that.  For any applications larger than thin seam lines i use Squadron white putty (it's better than their green putty in my opinion).  I haven't tried the Tamiya white putty yet, but I intend to.

Bondo brand automotive body filler; comes in a tube for small auto jobs. Readily available. Works just like Squadron Green or White or Tamiya (I guess; never used that brand) putties; a little tougher, I've found.

D500 posted:

Bondo brand automotive body filler; comes in a tube for small auto jobs. Readily available. Works just like Squadron Green or White or Tamiya (I guess; never used that brand) putties; a little tougher, I've found.

I happen to have some of that sitting in my garage.  I'm going to give it a try.