:::Filling In Pinhead Crevices On Bondo

[NDL]

This is my first time filling in a rusted hole on the quarter panel of my truck. I used bondo glass, supported the material properly, removed all of the rust before applying the bondo, etc.

Today I sanded it down, and applied a temporary coat of primer.

The end product looks quite good, although in a few areas are pinholes; in one small area, there are a few pinholes arranged in a cluster.

At my house I have 3M fiberglass resin; could I use this to fill in the pinholes, or do y'all recommend that I buy, and use, bondo to finish off the job?

In the pinholes is the primer coat that I had sprayed. Will the resin or bondo properly adhere to the pinholes? Again...we're talking about pinhole sized holes - a few of them in total.

Thank you in advance for your time.

 

[Linctex]

You need "Glazing Spot Putty" to fill pinholes

https://www.walmart.com/ip/Bondo-Glazing-and-Spot-Putty-00907ES-4-5-oz-1-Tube/16927984

 

[Whipcitywrencher]

Originally Posted by Linctex
You need "Glazing Spot Putty" to fill pinholes

https://www.walmart.com/ip/Bondo-Glazing-and-Spot-Putty-00907ES-4-5-oz-1-Tube/16927984


Yep some people swear by it, other's swear at it.

Personally I like the stuff.

 

[NDL]

Thank you both, for your time and suggestion

 

[ET16]

I used putty after Bondo in the body shop I worked in.

 

[KneeGrinder]

Originally Posted by rollinpete
Originally Posted by Linctex
You need "Glazing Spot Putty" to fill pinholes

https://www.walmart.com/ip/Bondo-Glazing-and-Spot-Putty-00907ES-4-5-oz-1-Tube/16927984


Yep some people swear by it, other's swear at it.

Personally I like the stuff.



I would be the person swearing at it, its basically a cellulose lacquer with no catalyst and has no place inbetween coats of acrylic urethane. But then again, I don't know what type of primer you put down, or sprayed. Did you spray primer from a rattle can? Are you going to spray a top coat paint from a rattle can? If so, go ahead and use that horrible bondo cellulose spot putty. I would if I had any, but I have not had any of that nasty stuff since the very early 80's.

The problem with pin holes is that, its impossible to get the hole completely filled so you end up trapping air. You end up with an air pocket, after the top coat is sprayed, the solvents will suck the paint material down into the air pocket and show and imperfection. Sometimes they will blister also, raise up!

If you spray with a rattle can, you probably won't really notice. If a professional shop did that and you paid for it, you would be a customer comeback. Shops don't like comebacks. They have to redo the job again and not get paid for it.

This is what professional shops use, or variations of this.

http://www.evercoat.com/product-detail/part-number/100400/us/

https://www.autobodytoolmart.com/u-pol-dolphin-glaze-finishing-putty-p-15125.aspx

 

[NDL]

Originally Posted by ET16
I used putty after Bondo in the body shop I worked in.


Thank you for your time

Originally Posted by kneegrinder

I would be the person swearing at it, its basically a cellulose lacquer with no catalyst and has no place inbetween coats of acrylic urethane. But then again, I don't know what type of primer you put down, or sprayed. Did you spray primer from a rattle can? Are you going to spray a top coat paint from a rattle can? If so, go ahead and use that horrible bondo cellulose spot putty. I would if I had any, but I have not had any of that nasty stuff since the very early 80's.

The problem with pin holes is that, its impossible to get the hole completely filled so you end up trapping air. You end up with an air pocket, after the top coat is sprayed, the solvents will suck the paint material down into the air pocket and show and imperfection. Sometimes they will blister also, raise up!

If you spray with a rattle can, you probably won't really notice. If a professional shop did that and you paid for it, you would be a customer comeback. Shops don't like comebacks. They have to redo the job again and not get paid for it.

This is what professional shops use, or variations of this.

http://www.evercoat.com/product-detail/part-number/100400/us/

https://www.autobodytoolmart.com/u-pol-dolphin-glaze-finishing-putty-p-15125.aspx


Thanks for taking an interest in my "project." Your assumption is right; both the primer, and paint, are from a rattle can.

 

[nthach]

Originally Posted by Linctex
You need "Glazing Spot Putty" to fill pinholes

https://www.walmart.com/ip/Bondo-Glazing-and-Spot-Putty-00907ES-4-5-oz-1-Tube/16927984

Eww. Get yourself some 2-part Evercoat Metal Glaze. Even Bondo's 2K putty will be vast improvement over their old-school lacquer putty.

https://www.3m.com/3M/en_US/company-us/all-3m-products/~/Bondo-Professional-Glazing-and-Spot-Putty/?N=5002385+8711413+3293241613&preselect=8711351&rt=rud

 

[Redright9]

I have had great luck with the Evercoat metal glaze, that's what I would also recommend as well.