Blasting chassis for painting

Quattromike

Quattromike

Well member-known
Anyone done a lot of grit/shott blasting of steel for preparation for painting? We have a few things that have built up a patina over the year that would look better with a clean up and paint.
Thinking about getting a small setup to do it at our leesure.
What to look out for?
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Quattromike said:
Anyone done a lot of grit/shott blasting of steel for preparation for painting? We have a few things that have built up a patina over the year that would look better with a clean up and paint.
Thinking about getting a small setup to do it at our leesure.
What to look out for?
Click to expand...
looking at Kurtis's wet blast set up on his CEE channel, if one were investing, I'd certainly be looking into that :cool: ...... shot/grit blast makes such a bloody mess :oops:
 
S

Steve

Well-known member
You need to match your air supply to the size of the nozzle + a bit of reserve for the air fed helmet. If you are able to sweep up the media, keep it clean & dry it can be reused but becomes less abrasive after each use.
 
Quattromike

Quattromike

Well member-known
250 CFM is recommend by some surpliers but I see some setups getting offer that's only 180 CFM, are they still ok or is it a case of you get by but better looking at it than looking for it 🤔
 
S

Steve

Well-known member
The CFM output will dictate the size of the nozzle you can use. So 180 CFM should be able to maintain pressure with a 10 mm nozzle which you would be able to make reasonable progress with for a small setup.
 
G

goldeneagle

Member
Blasted a 90' wide portal frame that old man bought in nineties, never had such a sore neck after doing it. Between the weight of the helmet and holding the hose back (1/2" nozzle) was sore at end of each day. Couple with the fact that you need to paint everything after it was a long day.

If you don't have a lot to do then it will be fine, nozzles can be sized to suit air flow available, the work rate difference between a 1/2" nozzle and 5/16" is remarkable though. A 400CFM compressor is expensive to buy and run so for big jobs we hired in a compressor and work away with our old 150 CFM for smaller bits and pieces.
The blast can be expensive with haulage a killer depending where your at. At the time got an artic load of crushed glass from Teeside to NE Scotland at reasonable price and it did a reasonable job.
A paint pump like a wagner control pro 250m is an essential part of set up in my opinion, started with a HVLP paint sprayer but between thinning paint and poor spray pattern ended up with poor coverage. Swapped to paint pump and just applied it straight from drum. Use red primer for first coat then swapped to grey for second coat as can see any bits missed easier.

Maybe sound a bit negative towards blasting but needs to be correct set up to work correctly however it sure as hell is better than wire brush and needle gun but is a dirty job.
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
won't beat an airless spray for paint coverage ... I had (have) a hydraulic one which is awesome, but need to spread everything out so you can get around it all - then roll over, etc. puts paint on faster than you can keep up (y):giggle::cool:
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Russell said:
Anyone used one of these?
Click to expand...
well Graco is usually good gear, but I've never had much luck with little leccy jobs -- usually diaphragm powered/pressurised - they go hard very quickly and are bloody expensive usually ... had two small leccy units and skipped the pair of them
these are similar to what I gave up with :(
this sort of style things - but this one looks to be hydraulic -- they weren't cheap -- and very disappointing
1760211173942.png

these are very similar to what I ultimately used to use (and kept) - brilliant unit - could prime a 45 foot boat in less than an hour (y)
1760210736461.png
1760210822932.png


just found this Graco looking for an image of the old ones i binned
1760211056115.png


big thing with airless is keeping them clean - you have got to be meticulous cleaning them after use, or they won't work next time out
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
CPS said:
Blasting is a job on its own, if there is someone local to you, let them at it would be my option 😁
Click to expand...
ideally at their own premises .... had some 8x4 durbar plates blast cleaned many years ago - customer wanted them cleaned back to bare and then lacquered for a floor in a shop .... 30 odd of them.
blasters came to my yard and did it, so we could get them lacquered the moment they were clean --- there was grit everywhere, even though we tried to contain it ... was grit in the yard for years after
 
Quattromike

Quattromike

Well member-known
CPS said:
Blasting is a job on its own, if there is someone local to you, let them at it would be my option 😁
Click to expand...
There used to be a place in Elgin that did blasting and painting, we used them the last time to paint our other truck and they did a great job. Problem is they've stopped doing the blasting for some reason. They still do the painting so the plan was to do the bed and paint it then send to them to do the cab.
 
sfrs4

sfrs4

Well-known member
There is a company not far from me, but unfortunately miles from you, called JB blasting, if you've ever travelled up the A1 from Grantham to Newark, you'll have seen their tanker advert in the field on the north bound side, absolutely brilliant, they will blast and paint for you in their yard, or do travel and blast at your place, they do everything from machinery/ steel work right through to brickwork buildings.
 
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