Date
1 - 8 of 8
Media Blasting
|
Bill Welch
I think Dennis meant Harbor Freight instead of "Horrid Freight."
I have used baking soda in the summer in Virginia with good results. I was using it outside. I liked it as it was cheap and easy to control. It will not touch brass but I used vinegar to etch this. Regarding using media blasting instead of paint stripper, I am not a chemist but somehow I just think putting such a powerful chemical, whatever it is, on styrene cannot be good for the styrene in the long run. And let me tell, you do not want to use Chameleon paint stripper with resin. You do not want to know how I know this. Bill Welch |
|
|
|
Frederick Freitas <prrinvt@...>
GUYZ,
toggle quoted message
Show quoted text
Bill must be talking about the FGEX truss rod reefer that has sagged to the railhead. And all this time I thought he built it that way. Great scenery for the repair yard. Fred Freitas ducking for cover --- On Wed, 11/11/09, Bill Welch <fgexbill@...> wrote:
From: Bill Welch <fgexbill@...> Subject: [STMFC] Media Blasting To: STMFC@... Date: Wednesday, November 11, 2009, 10:34 PM I think Dennis meant Harbor Freight instead of "Horrid Freight." I have used baking soda in the summer in Virginia with good results. I was using it outside. I liked it as it was cheap and easy to control. It will not touch brass but I used vinegar to etch this. Regarding using media blasting instead of paint stripper, I am not a chemist but somehow I just think putting such a powerful chemical, whatever it is, on styrene cannot be good for the styrene in the long run. And let me tell, you do not want to use Chameleon paint stripper with resin. You do not want to know how I know this. Bill Welch |
|
|
|
Gatwood, Elden J SAD
I would also avoid using media blasting using "grit", even the fine stuff, on
toggle quoted message
Show quoted text
resin, without watching VERY closely what it is doing to the surface. I tried to remove badly applied acrylic paint from a Westy G22, and while the acrylic blobs gradually came off, the surrounding unpainted resin was badly scoured and pitted. Elden Gatwood -----Original Message-----
From: STMFC@... [mailto:STMFC@...] On Behalf Of Bill Welch Sent: Wednesday, November 11, 2009 10:34 PM To: STMFC@... Subject: [STMFC] Media Blasting I think Dennis meant Harbor Freight instead of "Horrid Freight." I have used baking soda in the summer in Virginia with good results. I was using it outside. I liked it as it was cheap and easy to control. It will not touch brass but I used vinegar to etch this. Regarding using media blasting instead of paint stripper, I am not a chemist but somehow I just think putting such a powerful chemical, whatever it is, on styrene cannot be good for the styrene in the long run. And let me tell, you do not want to use Chameleon paint stripper with resin. You do not want to know how I know this. Bill Welch |
|
|
|
jerryglow2
I probably would not use it for paint removal on resin but do routinely hit the whole model prior to painting. Ted Culotta's articles almost universally mention doing this regardless of the material of the model.
toggle quoted message
Show quoted text
Jerry Glow --- In STMFC@..., "Gatwood, Elden J SAD " <elden.j.gatwood@...> wrote:
|
|
|
|
Gatwood, Elden J SAD
Yes, I should have tried other means to remove that "paint". Unfortunately,
toggle quoted message
Show quoted text
it adhered extremely well to certain portions, leaving others bare. Repeated passes with the tool actually bagan to remove the rivets in the center of the paint blobs, at which time I stopped. Examination of the surfaces around the paint blobs showed considerable erosion of the surface. Simple surface etching for paint adhesion causes no problems. Elden Gatwood -----Original Message-----
From: STMFC@... [mailto:STMFC@...] On Behalf Of jerryglow@... Sent: Thursday, November 12, 2009 9:00 AM To: STMFC@... Subject: [STMFC] Re: Media Blasting I probably would not use it for paint removal on resin but do routinely hit the whole model prior to painting. Ted Culotta's articles almost universally mention doing this regardless of the material of the model. Jerry Glow --- In STMFC@... <mailto:STMFC%40yahoogroups.com> , "Gatwood, Elden J SAD " <elden.j.gatwood@...> wrote:
|
|
|
|
pullmanboss <tgmadden@...>
Elden wrote:
Abrasive blasting doesn't work well on resilient materials. I'm not a metallurgist and am probably using the wrong words to describe properties, but take solder on brass. Solder is softer than brass, but both are rigid materials. Grit blasting will erode the solder much faster than the brass. But paint on resin is different - particularly pockets of thick, residual paint left after chemical stripping. The paint is softer than the resin, but it may be more resilient - recoiling under the pressure of the grit blast and rebounding to bounce the grit off rather than being abraded. As I say, there must be better terms to describe the properties of the various materials and surfaces, but I hope you get the idea..... Tom Madden |
|
|
|
golden1014
Gentlemen,
toggle quoted message
Show quoted text
There are two factors with grit blasting. One is the media, the other is the blast pressure. If you use 120 psi you're going to blast off everything in sight. I grit-blast almost everything with fine blast media in the 60-80 psi range. I even weather models with it. In my opinion, if your modeling emphasis is freight car construction, a grit blaster is an indispensible tool. John Golden Bloomington, IN --- In STMFC@..., "Gatwood, Elden J SAD " <elden.j.gatwood@...> wrote:
|
|
|
|
Gatwood, Elden J SAD
John;
toggle quoted message
Show quoted text
I also like my blaster, but I just learned the hard way not to spend too much time in one place on a resin kit. Elden Gatwood -----Original Message-----
From: STMFC@... [mailto:STMFC@...] On Behalf Of John Sent: Thursday, November 12, 2009 1:02 PM To: STMFC@... Subject: [STMFC] Re: Media Blasting Gentlemen, There are two factors with grit blasting. One is the media, the other is the blast pressure. If you use 120 psi you're going to blast off everything in sight. I grit-blast almost everything with fine blast media in the 60-80 psi range. I even weather models with it. In my opinion, if your modeling emphasis is freight car construction, a grit blaster is an indispensible tool. John Golden Bloomington, IN --- In STMFC@... <mailto:STMFC%40yahoogroups.com> , "Gatwood, Elden J SAD " <elden.j.gatwood@...> wrote: erosion of the surface. Of jerryglow@... Sent: Thursday, November 12, 2009 9:00 AMof the model. <elden.j.gatwood@> wrote:
|
|
|