...DML's Magic Tracks knock out marks? I have never used these tracks; I prefer metal tracks, but money is tight now and I don't think Fruil makes them for M1A1 Abrams anyway. I assume a new sanding stick and go for it, but I was just curious how you guys do this; what size sanding stick? any particular brand you recommend? etc. - pics would help too, not necessary, but helpful nonetheless.

Thanks!

-Felix

sharp knife (though carefully!)

I fill with putty and file smooth ..

Felix- you can custom shape the sanding stick by using a pair of diagonal cutters or nippers to narrow or taper the outline of the stick so that getting in to tight spaces is easier. I use el cheapo fingernail boards from the drug store for this tricky stuff.
Cheers!
Rick

Same trick here!

great idea - I'll give it a shot, thanks!