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Will bondo hold up to abuse on a synthetic stock? I want to build up the comb and I am not sure what to use. My fear is that if the bondo gets more than 1/8" thick it may break off if then gun is bumped on something hard. What other options do I have? ****************************************************************** R. Lee Ermey: "The deadliest weapon in the world is a Marine and his rifle." ****************************************************************** We're going to be "gifted" with a health care plan we are forced to purchase and fined if we don't, Which purportedly covers at least ten million more people, without adding a single new doctor, but provides for 16,000 new IRS agents, written by a committee whose chairman says he doesn't understand it, passed by a Congress that didn't read it but exempted themselves from it, and signed by a President, with funding administered by a treasury chief who didn't pay his taxes, for which we'll be taxed for four years before any benefits take effect, by a government which has already bankrupted Social Security and Medicare, all to be overseen by a surgeon general who is obese, and financed by a country that's broke!!!!! 'What the hell could possibly go wrong?' | ||
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A lace on pad. Try a look at Brownell's catalog or maybe somebody else can give a tip in that regard. Bondo is a polyester based material and has poor bonding properties to many materials with different coefficients of thermal expansion, and elasticity. If you are referring to an injection moulded stock I would not be optimistic at all regarding your potential for success.  If yuro'e corseseyd and dsyelixc can you siltl raed oaky? | |||
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ROSCOE, Your fears are well founded. It will crack and the bond is not near as good as an expoxy. I would use Acraglass gel and tint it black if I was you..... and if I had a mind to work with synthetic stocks. | |||
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DigitalDan, I have bedded a $50 injection molded stock with Bondo 2 part epoxy. I was under the impression that epoxies may vary 20 to 1 in cost, but it is question of thickeners and delays. The basic epoxy is 20 ksi compression and they are all about the same co-efficient of expansion: 10 to 11 (in/in.oF x 10-6), while steel is 7.3. I know epoxy will not stick worth beans to an injection molded stock, so I under cut the stock and get a mechanical attachment. This results in the stock being heavier than a wood stock. I am not advocating Bondo, it sets up too fast and is too runny. I am not advocating injection molded stocks. And this is the bottom of my shallow well of knowledge. | |||
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About the only thing that holds Bondo on car bodies is the paint!  I’ve seen big hunks of the stuff fall off cars due to nothing more than vibration and road bouncing. Whoever named the stuff obviously never used it because it doesn’t “bond†worth a damn. | |||
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In some synthetics I've even had trouble getting acraglas to stick. This was the case with a M-70 stock a few years ago.....not sure what it was made of....but it wasn't compatible with the epoxy. Molded stocks may be the worst.....not sure...this much I know.....if it's polyethylene nothing will stick to it.....others may be the same. /////////////////////////////////////////////////////////////////////////// "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill | |||
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Roscoe Bondo Body Filler works well for filling in minor blemishes on glass stocks but not for building up areas more than 1/16" or so and definitely not on poly stocks. I use Bondo on all my stock work - it is what McMillan uses, by the way. To build up a big area use Acraglas reenforced with glass matt. I also have built up some pretty big areas with the Bondo Fiberglass repair kits sold by Ace hardware. It has the advantage of hardening in about 15 minutes so you have to do a little at a time. Just make sure that the build up is with the matt and not the epoxy. Rough the surface with 60 grit paper and it will stick. If I knew how to post photos on here I would show you a couple of stocks where I have built up both buttstocks and foreends. Good Luck. Ray Arizona Mountains | |||
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tnekkcc,  I wouldn't be so sure of the depth of that well, might be deeper than you think. It is entirely possible that I missed a curve in the product evolution of Bondo, it used to be a polyester resin some time back. Or perhaps they have different recipies?  I know it is fairly common for some to BED with it, but the posed question was about building up a cheekpiece...  I'd still spring for a leather lace on pad and be done with it.I am sometimes befuddled by the variety of "synthetic" stocks out there, either by the different materials or different brands of the same stuff. I wouldn't spend anytime working on them for the most part. They are NOT the same thing as a COMPOSITE stock, made of foam core and lay ups done by hand. World of difference there, just as between epoxy and polyester resins. If yuro'e corseseyd and dsyelixc can you siltl raed oaky? | |||
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Rick you aint spos to but bondo on painted areas. Ya gotta use a disc sander and 40 grit sos it will stick to the metal. Then sand back any bondo on the paint, cause bondo needs a rough surface to bond too. Any bodyman that spreads bondo over paint is a dip shit. Any moron can mix up bondo and spread it on a painted dent. But he aint a body metalman , all he is is a moron . Bondo absorbs moister if not sealed with good automotive primer and paint. It bubbles up if used on rusted areas too. Bondo isnt good to use on fiberglass either. I used to paint custom vintage cars , so I had to give the bondo lecture   | |||
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GSP7, good job, but you left out that bondo is a body filler, meant to be used after the metal was brought back up as close to original level as possible, then a skim coat of bondo is used to level out the low spots. People slap it on like its gunnite or somethin, and then complain when it cracks, go figure! DRSS(We Band of Bubba's Div.) N.R.A (Life) T.S.R.A (Life) D.S.C. | |||
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Hard to tell if you’re serious...but my point was that the paint (over the bondo, not under it) is about all that holds it on. Sort of like the old joke about the only thing holding the car together is the rust. | |||
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Rick , I was just blabbing old knowledge from the past, kinda boreing myself. Bondo flashback trip I bet hollywood uses 50 gal drums of bondo to repair stunt cars that they have to repair before each movie seen. I was at Ed Roths house , years ago , that guy loved bondo  | |||
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Or you could but a Cheek-Eze Pad and be done with it also. If you feel uneasy about the glue they use on the back of it, then you could use super glue or Goop to give it a good hold. http://www.cliffsgunsmithing.com/Catalog_Kickeez_703.htm -Spencer | |||
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Years ago I did a wreck in a 1965 Mustang on a show where I got hit square in the rear quarter panel by a cop car doing about 45 mph. The whole back end of my car literally blew up in a shower of bondo. That same car had been used over and over again for chase scenes and there was more bondo than there was sheet metal on the damn thing. | |||
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I may try the fiberglass route. If I recall corrrect, Phil Shoemaker used this method on his favoriet 458....the famous ugly rifle! I want to stay away from any pads that strap or stick on....I want something that will take some abuse. ****************************************************************** R. Lee Ermey: "The deadliest weapon in the world is a Marine and his rifle." ****************************************************************** We're going to be "gifted" with a health care plan we are forced to purchase and fined if we don't, Which purportedly covers at least ten million more people, without adding a single new doctor, but provides for 16,000 new IRS agents, written by a committee whose chairman says he doesn't understand it, passed by a Congress that didn't read it but exempted themselves from it, and signed by a President, with funding administered by a treasury chief who didn't pay his taxes, for which we'll be taxed for four years before any benefits take effect, by a government which has already bankrupted Social Security and Medicare, all to be overseen by a surgeon general who is obese, and financed by a country that's broke!!!!! 'What the hell could possibly go wrong?' | |||
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I have had fair [?] success with bondo on some of the synthetics but I roughed the %^& out of the area[40 grit] and, JUST before applying the Bondo, sprayed the area with a brakecleaner fast dissolving type and immediately slapped on the Bondo. Then shaped it to what was needed. It seems the super rough/clean area held pretty well. So far --??so good. Never came back When the fear of death is no longer a concern----the Rules of War change!! | |||
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