Re: Help me find these bike partsHi!
> On Apr 29, 1:43 am, Volker Bartheld <dr vers...@freenet.de>
>> In fact, rust converters don't "know" how thick the
>> rusted surface is. So you still risk nests where the paint probably won't
>> stick and come off if there is shear and the area is too large.
> Good, so you have used it. The part about the paint not sticking to
> the black end result worries me (converter).
I used a product called "BOB" with relatively good results. I also used
"Fertan" for the instide of my Yam YZ426F's frame (where there was no need
to paint over the converter). Fertan-manual says, you should just rinse off
the excess product and let dry. So it's water-soluble and you'll probably
have to sand it lightly to get a good surface for the primer (who hopefully
won't dissolve/eat away the converter). You'll have to test the
combinations. I found that a combination of expoxy primer with acrylate
paint didn't work to my satisfactio. The two chemistries seem to be
incompatible.
> Do you suppose that it
> would solve any potential problems if I was to completely prime the
> tank after applying the rust converter?
I would do this in any case. Only a complete priming guarantees a good
surface for the paint that is to follow.
> As you can see in the link
> http :// tinyurl,com /3glj6f I have a considerable amount of rust to
> deal with. Is it true that I'm better off leaving most of the rust in
> place so that the converter has more material to work with by just
> using a wire brush instead of say, a 200 grit sandpaper?
I wouldn't do so. Actually, I would remove the rust as good as possible and
leave a surface as smooth as possible. All water based rust converters will
also work on naked metal (since there always is a thin layer of oxide or it
will develop in the watery environment), so the less rust the better I'd
say.
> If this was your project how would you treat the rust?
I would first scrub off the big parts with a brush. Then 200/320/400 grit
sandpaper. And probably a sandblasting unit.
> Naturally I'm
> hoping to achieve a fairly even finish. Meaning I may have to sand the
> black end result in order to smooth it out (I suppose).
Take care. The rust converter (at least the products I kown of) don't leave
a very hard surface. So you can easily sand through the layer (which is not
a big problem if you do your priming soon after).
> Btw I went to the printers today and they do print to order in a self
> adhesive material that is ideal for creating decos with, which is also
> clear coat resistant.
Perfect!
> Also, a store here has spray cans of clearcoat
> for just 9 bux.
Is it a "ready-to-go" can? In my experience, those don't get a hard and
scratch-resistant as the bottles you mix with hardener and thinner. I
always use a 2K-system, the litre of clear coat is arount 50-60EUR (30USD)
plus hardener (should be mixed 1:2) for 10EUR or so. That works fine, can
be applied using a spray gun or paint prush (compatible with acrylic
paints) and relieably hardens even with lower temperatures (below 15°C all
1K systems take ages until the finally get hard). Try it out on some sheet
metal to get a feeling how those cans work. There are good and bad ones.
> I'd like to apply some 3 coats of it once the decos
> are on but how do I do this? Do I just wait for the previous coat to
> dry and repeat or do I need lightly buff in between application?
Don't buff. The timing depends on the way you apply the coat. If you use a
spray gun/can (close to no mechanic force on the previous layer) you'll
only have to wait until the earlier layer doesn't run anymore but still is
a bit sticky. Hint: In that state, it will still accept fingerprints (gets
dull where you touch it) but you won't be able to move it or wash it away
with compressed air. That way, the layers will stick to each other best.
Don't overdo, stop spraying as soon as there is some gloss.
For paint rolling or brushing, you need to wait longer because you actually
touch the surface. Rolling (I don't recommend that for clear coat) will
mean almost a complete cure time (a day or so) for brushing few hours would
be OK (normal room temperature).
> How light do you apply the clearcoat?
Very light. Hint: More thin layers are better as one thick layer.
> Yes, I do enjoy learning from those that have had the experience and
> I'm not afraid to admit to it. Otherwise what's the point in being
> here?
Yup. Exactly. Probably you should first try your methods somewhere where
the learning curve won't hurt. Getting access to a spray gun (even if it is
a very cheap thing for around 40-50 bucks) and an air-compressor is an
invaluable thing. It will allow to apply much thinner layers, reducing cure
time and costs. Also there is less danger that you get ugly noses because
the paint was too thin or the amount too high.
In my opinion you should do a spray painting of clear coat as soon as you
plan to have stickers under it. It will simply give you a much flusher,
nicer surface. If you spray, you should pay great attention to a dust-free
room/location. I also did "outdoor stuff" and there seems to always be a
fly wanting to sit on fresh paint...
Good luck!
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