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Antique Tractor Paint and Bodywork

Hardener and filler questions

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Alan8n

05-05-2008 19:37:54




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Kinda new at this painting stuff so bear with me:

First:
I just read the posts about using hardener that has been opened and shitting on the shelf past the amount of time reccommended by the manufacturer and have 1 question about that. What would happen if the hardener was in fact NG. Would it simply be like painting without hardener or would it screw up the paint to the point where it won"t not dry correctly or worse ????

Second:
I have to repair a dent in my tractor. I banged it out pretty good but I still have a slight crease to deal with. I have used both filler and glazing putty in the past, and it always drives me crazy when I need a little bit and the can says "mix 1/4 of the can with 1/4 of the tube of cream hardener". How imprtant is getting the exact right mix. My thought is that if it were that important they would have given you a better way to measure it, but as I said earlier I am a newbie.So if you get the mix off a little will it just take longer or shorter to cure or could it be worse than that??
Any help greatly appreciated.....
Thanks....Alan

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B-maniac

05-07-2008 19:30:36




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 Re: Hardener and filler questions in reply to Alan8n, 05-05-2008 19:37:54  
What the others said. Until all the so-called "bargain" companies started producing catylist at 1/2 price , the shelf life wasn't an issue. It still isn't with the "good" stuff. (PPG etc). If it ain't gelled or bubbly/thick in the can then it is good. It doesn't lose it's "power" so to speak. If it is gelled or thick then dump it cause it WILL affect your paint and not in a good way either.



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soundguy

05-07-2008 11:36:09




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 Re: Hardener and filler questions in reply to Alan8n, 05-05-2008 19:37:54  
As the others said.. the more hardner you add, the faster the filler gells and cures.. the less you use.. the slower it sets up. I go by color.. for instance.. on a white filler a dim pink will setup slower and can be worked longer than a light pink.. and a redish mix will setup probably under a minute or so. Once you mix up enough.. you know what will do what. A couple tablespoons of filler and an inch long squirt of hardner is going to be a medium fast setup I peas sized amount of hardner per tablespoon filler will be slow. A 3" line of hardner on 2 tablespoons filler will gel fast.. and 4" will gell before you done mixing it good and can spread it on!

soundguy

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CNKS

05-06-2008 07:00:03




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 Re: Hardener and filler questions in reply to Alan8n, 05-05-2008 19:37:54  
Mixing body filler takes a little practice. After a while you get a feel for it. If it dries before you get it on reduce the amount of hardener, if it takes an hour before you can sand it, increase the amount, etc. As Circus said the amount of hardener is not critical. No two batches will be the same. I keep my paint hardener refrigerated and add Bloxygen (do a search) to it to be on the safe side.

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Circus

05-06-2008 00:12:10




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 Re: Hardener and filler questions in reply to Alan8n, 05-05-2008 19:37:54  
Often have used really old hardener and never had a problem. Well at least from the hardener. Hardening filler is one of those touchy feely skills you learn by doing. Unless your way way off it should work fine.



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c35

05-06-2008 12:25:51




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 Re: Hardener and filler questions in reply to Circus, 05-06-2008 00:12:10  
less hardener then ideal will just increase the time to cure. too much and you will have it hard to work with ...very stiff.



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