Ben Hart
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[quote=”bobwires” post=16745]of all the plastic bonding products Ive used I have consistently ran into the same problem. pinholes, and they don’t sand worth a crap. in my mind repairing bumpers is a losing battle, but when they are really reinforced the repair should last fine. most of my work is interior parts, and whenever possible I stick to ABS plastic, CA glue, and poly fillers.[/quote]
Of all the products I have used, the 3M is by far the easiest to sand (very nice). And has minimal amounts of pinholes. The Dominion Sure Seal products are ok (for economy brand stuff). Theirs are mediocre to sand. The neat thing with theirs is that they come in different rigidities. The more rigid ones would be better for interior parts.
[quote=”bloverby” post=16728]I’d skip the skim coat and go with poly primer.[/quote]
I second that. It has high build, is much easier than skimming with putty and much cheaper than Urethane primer.
Spray several coats of poly primer, let it dry overnight. Sand with anything from 120-220, until you are satisfied, then reprime with urethane primer.
[quote=”bondomerchant” post=16739][quote=”Ben” post=16738]I haven’t played in the snow in years. We grew up poor, the best we got to do was ride behind the truck on a sled with a rope tied to the bumper. And where we were we had Lucky beer, probably cheaper than Keystone and twice as potent![/quote]
ya sure that wasnt lucite ya goober:rofl :rofl :rofl :rofl :rofl :rofl[/quote]You got it all wrong, no moron drinks paint. The secret is to soak the pink 3M dust filters with blending solvent first thing in the morning…makes the day go by much faster! And if you keep soaking the filters non stop you avoid the inevitable headache! :rofl
[quote=”bobwires” post=16727]I want to try that fancy pants stapler thing that was posted here a couple months back. hot wire embedded in the bumper to hold it straight, and a little plastic filler to smooth it out. I’ve seen lots of bonded plastic come apart later because it wasn’t properly reinforced, and it takes a while to do it right. the staple stuff looks fast.
Ben, why don’t you like the air powered plastic welders? I think having a plastic wire-feed welder is pretty wicked![/quote]
I find the airless quick and easy to use, but I still prefer the bonded method.
I have had a lot of 3M training (especially for plastic repair). I love their system. The thing I like with bonding is that you fill it at the same time that you bond it. The products 3M has set in 50 seconds, 3 minutes and 15 minutes. The 15 minute product sands and fills extremely well. Technically, polyester fillers should never be applied over flexible plastic, and it seems that most people who plastic weld resort to this.
Oh, and in regards to plastic bonding coming apart, it is basically entirely due to user error. Reinforcement tape is required, as is adhesion promoter (which has to be used properly). Another issues is using the correct product (flexible for flexible plastics and rigid for rigid plastics). The system is easy to use, but there are several crucial steps, if just 1 is not followed properly than the entire repair is compromised. I have actually seen most plastic failures due to incorrect plastic welding and/or use of polyester products.
I haven’t played in the snow in years. We grew up poor, the best we got to do was ride behind the truck on a sled with a rope tied to the bumper. And where we were we had Lucky beer, probably cheaper than Keystone and twice as potent!
Where are you located?
In Canada you are required to be Certified. There is national certification (Red Seal) as well as slight variations amongst provinces that may allow you to obtain certification that is only valid in that province. In order to work in a body shop you either have to be certified or an apprentice (who is signed up and active in the apprenticeship process). Of course there are grey areas and certain people slip through the cracks.
Our certification is similar in some ways to ICAR and ASE.
[quote=”sined240″ post=16718]What are you doing to prep the raw plastic? what grit sand? any adhesion promoters? and what kind of primer/sealer and is it just urethane or epoxy?[/quote]
There are countless ways to properly prep a raw plastic bumper based on preference and products.
That should get it straight, but it is a lot of work. I don’t know that I would skim the panels with filler and putty, unless I felt they really needed it.
Keep up the good work, they are all turning out great!
But from looking at your photos, I have to wonder what its like to have to mow your lawn in December…
The airless is the way to go (like Bondo’s).
I personally prefer bonding repairs, but welding has its place. :cheers
Keep up the good work!
That is one ugly car…
Looks like someone put a lot of good hard work into it, I am sure the owner must love the car
[quote=”bobwires” post=16669]this is what I saw. low profile, basically an air saw.
[IMG]http://www.btbtools.com/Image/2_Shopping_Cart_Detail_Images/WKTEC-BX_z.jpg[/IMG]
http://www.youtube.com/watch?v=pF4hpR3SLME%5B/quote%5D
I’ve used one like that and wasn’t overly impressed.
[quote=”bobwires” post=16668]of course my lifelong dream is to have a Pacer or Gremlin. 70’s had some real doozy’s too :stoned[/quote]
I used to have a Pinto…I gave it a quick splash and there was only 1 logical colour, lime green! :cheers
[quote=”dcturcotte” post=16640][quote=”Ben” post=16637][quote=”Nexson” post=16624]man, you weren’t lying when you said it was 12 degrees when i called you today.[/quote]
its -22 (C) here, looks like we have about the same amount of snow.. [/quote]
I’m surprised to hear you say that, I had some friends visit from Airdie and they put me under the impression we had more snow then you guys. I don’t know if we have quite that much in Edm, probably close though. Up north by slave lake they got dumped on a few weeks ago.[/quote]
I’m in NE Calgary. We had a big dump a little while back, but it hasn’t gotten warm enough to melt much of it. Just the other day we got a little bit more on top of the old stuff. Calgary is kind of funny (partially because of its size). The weather in one area is often quite different than another.