Russell
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| posted on 6/4/08 at 01:18 PM |
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Grit blasting
The paint on my all-steel trailer is peeling away badly and it's rusting a lot. I want to give it a lick of paint before it gets too bad. The
finish isn't critical because the thing is only used for trips to the DIY store and down the dump.
I've got a 2.5HP compressor (not sure of CFM) and a grit blasting air tool and I thought about blasting away the flaky paint before repainting.
I remember using Nitromors on the underside of the trailer years ago to address the same problem and that was pretty cr4p to work with and it
wasn't too effective either.
Anyone got any tips/do's/dont's before I have a go at this? Also, I haven't got any grit/beads so I wondered whether kiln dried
sand would be any good?
Ta!
I'm a bilingual illiterate. I can't read in two languages.
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blakep82
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| posted on 6/4/08 at 01:22 PM |
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use a zinc primer. i was always pretty wary of how good they really are, but having painted my axle with it, any bits that chip off (which is a few at
the moment, it will need to be painted again) shows the metal to be a nice healthy black colour underneath, so there's been some kind of
reaction underneath
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triumphdave
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| posted on 6/4/08 at 01:23 PM |
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Dont use sand its a bit dodgey there is a thread somewhere on here about it.
If you always do what you have always done you will always get what you have always got
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blakep82
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| posted on 6/4/08 at 01:27 PM |
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hmmm, sand, silcosis or something you can get form getting sand in your lungs.
might be ok if you wear a proper mask though?
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MikeR
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| posted on 6/4/08 at 01:36 PM |
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recently re´read sand thread,basically its a real no no. verybad for you and youll need an air fed mask if you want to use it is my summary of the
thread.
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rusty nuts
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| posted on 6/4/08 at 02:35 PM |
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Get a quote from your local blasting company, they will do a better job and its a damn sight safer.
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zilspeed
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| posted on 6/4/08 at 03:41 PM |
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There's nothing that a wire brush in an angle grinder (aka 'the tool' ) won't remove.
Grind a section clean, paint it.
Repeat until finished with a little overlap between sections to make sure.
Blasting is a real no no unless you live somewhere remote and on your own.
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aerosam
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| posted on 6/4/08 at 06:20 PM |
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quote:
Originally posted by zilspeed
Blasting is a real no no unless you live somewhere remote and on your own.
Or you have access to a large industrial grit blasting cabinet. Me so lucky! 
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Russell
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| posted on 6/4/08 at 07:16 PM |
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Oo err. Well and truly put off grit blasting using sand!!! Revert back to plan A and use the wire brush then.
Thanks for saving my lungs guys!!
I'm a bilingual illiterate. I can't read in two languages.
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blakep82
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| posted on 7/4/08 at 12:28 AM |
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i still can't work out how i'm going to get all the paint off my chassis... i'd like to sand blast it. i've not got a blast
cabinet to fit it in sandpaper would be a nightmare on my chassis... it would be rusty before i'm finished, don't kinow what to do 
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zilspeed
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| posted on 8/4/08 at 08:01 PM |
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quote:
Originally posted by blakep82
i still can't work out how i'm going to get all the paint off my chassis... i'd like to sand blast it. i've not got a blast
cabinet to fit it in sandpaper would be a nightmare on my chassis... it would be rusty before i'm finished, don't kinow what to do
Derust a section with your wire brush equiped grinder then prime it.
Overlapping the next section the next day isn't a problem.
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blakep82
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| posted on 8/4/08 at 08:11 PM |
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quote:
Originally posted by zilspeed
quote:
Originally posted by blakep82
i still can't work out how i'm going to get all the paint off my chassis... i'd like to sand blast it. i've not got a blast
cabinet to fit it in sandpaper would be a nightmare on my chassis... it would be rusty before i'm finished, don't kinow what to do
Derust a section with your wire brush equiped grinder then prime it.
Overlapping the next section the next day isn't a problem.
have you seen my chassis though?
i won't be able to get a grinder into most of it...
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MikeR
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| posted on 8/4/08 at 10:12 PM |
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lots of plastic sheeting and ali oxide then ????
(i've no idea of the health implications to ali oxide - although i am curious)
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blakep82
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| posted on 8/4/08 at 10:24 PM |
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sorry about the picture size, think grit blasting mihgt be the only way...
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