C1 Body work related question

[studiog]

I am just finishing up some body repairs on my 61. I have repaired an area with fiberglass to just below the surface and then used filler to finish it off to surface level. I had planned to fill a few imperfections with glazing putty until I read in a paint forum (I'm not farmiliar with this forum so I thought I would ask here where I know there is a high level of expertise) not to use glazing putty because it can soften when the primer and paint hit it. Isn't this what it is made for? Does anyone have any feedback regarding this? Thanks.
Gary

 

[mike weyman]

the problem i find with spot putty is that it is really soft,if you're on a curve where you cannot block sand, it comes away so easy that it will leave an impression in the finish.
what you need is a product called "flowable polyester putty"this stuff seems like thinned out(finer grain)body filler that flows like the spot putty.it does not get as hard as filler so it can be sanded with 220 grit paper,but is harder to sand than spot putty.
this polyester comes in a can and can easily be identified by the presence of a tube of hardener.
i'm finishing the 75 now for paint and tried some regular glazing putty( i had leftover) and it really sucks. there was a tiny rock pick in the t-top and i puttied it. when i primed it was still visible, i sanded it like a small concave,smoothing out the chips edges ,then applied polyester putty, block sanded, and voila, no chip.
it will be worth the $15 dollars.mike

 

[Ron Miller]

The two part (using a hardener) poly fillers are head & shoulders above the old glazing putties, in my opinion. They'll fill the smallest pinhole with no shrinkage or pullout, I use a single edged razor blade to apply them & work them into a small pinhole. The old glazing putty is a thing of the past in my repairs. My two cents . . . .

 

[studiog]

Bought some polyester putty & hardner today at the local body supply shop. The manager there agreed that the one part Bondo glazing putty just isn't up to the task for a first rate job. Thanks for the advice guys.

 

[studiog]

Tried out the putty with hardener last night. It worked great! Really feathers very nice. Finishing out a repair is so much easier than with plain filler. Saves a ton of time. Thanks all for the advice.