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Old 01-09-2009, 01:53 PM
MrPhotographer06's Avatar
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Bondo?

What are some tips and tricks to bondo?

How long will it sit on the platter before its too hard to use?

I've used fiberglass resin and its pretty easy to use, just icky.. one trick i learned is to work fast, and get someone to stir it! Any other tricks?

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Old 01-09-2009, 03:18 PM
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do an internal search, see title bar, here is plenty of information out here , a fellow named bondoking wrote some good stuff with pictures.

An easy question that has been answered just about as much as how do you wire a 1 wire alternator ... watching these two threads to see which gets asked the most ...

All kidding aside the answer is here try the search tab
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Old 01-13-2009, 10:51 PM
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if you are not familiar with spreading plastic then you should use small amounts of hardner. this way you will have plenty of time to get it smooth.you will find out that the slicker you lay it out the easier it is to sand.plus over harding makes pin holes,they are little bubbles in the plastic and when you sand it down they become holes.do one panel at a time.start with straight plastic to get your fill and then on your last coat mix in alittle fiberglass resin to make it a glaze and it will flow out smooth that way you can use a finer grit 120 or 240 to finish it off before primer. also if you need alot of fill you should use a reinforced plastic like dana hair. and get on it before it dry with a long board and some 40 grit. just after it sets but just before it dry, way easier on our shoulders
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Old 01-13-2009, 11:45 PM
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Also I found when I was first starting...

When doing a lot of filling, you may have lines of high spots from the ends of you filler, or any other messy stuff. A 'cheese grater' works wonders for quickly removing all this extra filler which is certanley going to be sanded off anyway. Before the filler fully kicks over, but not while its still goopy, just lightly draw it over to knock any excess crap off.
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Old 01-14-2009, 10:49 AM
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Temperature makes a difference too. Bondo will kick off quicker on a hot day than on a cool day, even though the same amount of hardener was used. So, if it's warm, use a little less hardener.

Remember to roughen up and clean the panel to be bondo'd also. The better it can "bite", the better long-term.
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Old 01-14-2009, 01:13 PM
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its got a good bit of body work to be done but i plan on cheating and using bondo on the lower hood, hood corner, crack in the fender, and probally the A pillar behind the windshield where the VIN tag is
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Old 01-14-2009, 01:50 PM
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First of all, the brand name Bondo has some negative connotations - it used to be "crap".....and it might still be or might be the best and the greatest thing in the world for body filler. I WONT use it now that I've found other pro level products like Everfil Rage, Gold and a couple of others made by this company.

As Pepi says, do a search - there are literally reams of threads about body fillers and the best ways to apply - and yes, on a hot day - I've had filler kick between the bench and the car then had to rethink my mixing ratio.

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Old 01-14-2009, 03:58 PM
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never lay it down thcker than 1/8", if you do you are asking for trouble down the road....shrinking and cracking.

Vince
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Old 01-16-2009, 12:34 PM
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As all have said, the hardener is the key when it starts to harden. One way I judge how long I have is to watch the color of the bondo after adding hardener. Trial and error when mixing will tell you alot. You also do not want to keep applying the putty once it starts "to go". In other words , when applying it it should stay smooth, once it starts to get like cottage cheese, it's going away. And you should just throw it away.
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Old 01-16-2009, 01:16 PM
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Ditto w/ the search recommendation. This site already has a wealth of great information on virtually every car topic and basic topics like this there is the equivalent of a PhD!

Remember no matter how careful you are finishing a bondo job, there will be a plastic/metal interface line in the final paint job unless you prep the car with a coat of hi-fill primer and block sand that down before you paint. Don't expect a spot primer over a patch to do the deed. Prime and sand properly and you will have a near-perfect repair.
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