new panels with black paint or etch primer??

Hi guys was wondering about those panels you buy with the black paint,is it etch primer?? Just curious if it is then I can just block it and shoot my high build over it..

Thanks
Fabo

Too late after.
Strip it off i reckon.

The black could be air dry enamel, acrylic laquer, 2 part epoxy, single part epoxy, electro coat? Who know's it could be anything. Strip it to bare metal if you have to guarantee it to a customer or yourself.

you can bet it isn't etch primer 🙂 you can test it by rubbing at it with various solvents, but the EASY way is to run it down to the sand/media/soda blasters and have them give it the treatment. And take pics. I used Absolute Blast in Landsdale and they did a nice job of a box full of bits and pieces for $80.

buzz it back with 80g or file finish depending on type of job, ensure bare metal is coated with either an etch or epoxy before primer

Thanks guys ,its all been primed now..

Might give the boys at landsdale about blasting my pan,will save me so much work and not to mention mess....

thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

Peter Leonard wrote:thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

She'll be right!!!!!!!

cnfabo wrote:

Peter Leonard wrote:thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

She'll be right!!!!!!!

unless she's an engine case 😉 post up some progress pics you lazy bugger 🙂

Peter Leonard wrote:

cnfabo wrote:

Peter Leonard wrote:thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

She'll be right!!!!!!!

unless she's an engine case 😉 post up some progress pics you lazy bugger 🙂

Lol,honestly I'm a bit over putting pics up,it takes me so long as I'm a spaz on computers,actually I don't even have one I only have a tablet and I'm even worse on that,lol.....when its done I'll put pics up....I'm almost ready to high build it then put my colour on....

cnfabo wrote:

Peter Leonard wrote:

cnfabo wrote:

Peter Leonard wrote:thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

She'll be right!!!!!!!

unless she's an engine case 😉 post up some progress pics you lazy bugger 🙂

Lol,honestly I'm a bit over putting pics up,it takes me so long as I'm a spaz on computers,actually I don't even have one I only have a tablet and I'm even worse on that,lol.....when its done I'll put pics up....I'm almost ready to high build it then put my colour on....

in the immortal words of several Adam Sandler movies: "You Can Do It"

take a photo with your mobile and load it up, or email it to me and I'll also be over posting the pics up for you 🙂 .

Hopefully this weekend the clear coat will go over my 'new' tinware, AND i'll post pics. eventually.

Peter Leonard wrote:thing that bothers me about blasting a pan and larger bits is that there are bearing surfaces and nooks and crannies where the media shouldn't get. I spose if you mask it well enough it should be okay. bit like people who acid dip engine cases and wonder why they're screwed afterwards.

acid dip engine cases, like vw ones?

duh! they are made of mag so yeah acid will eat it in no time. (in minutes)

unlike a cast iron block, acid dip will clean it really good and not harm it one bit.

media blasting is fine, its the operator who is to blame if anything goes wrong.

apparently soda blasting is reasonably mild as the particles explode on contact with the material instead of staying solid like tiny projectiles of evil that rip into it, but I read that on a soda blasting website. The heat generated by the friction of the media smashing into panels can warp them, but again this is usually due to operator error. Of course the end result is the same whether it's operator error or not- a bunch of work left for you to do to fix it.

Media blasting with sharp stuff like garnet, causes millions of pin pricks in the surface of the metal. If it is a thick panel frame or chassis, this is fine. On thinner panels it causes the surface to expand. So when the outside surface gets bigger than the inside metal, the panel warps, or basically trys to turn itself inside out. It is not just a heat issue.

Yup, I imagine it's a bit of both- like when you paint one side of a board and it absorbs moisture which expands that face, making it bow/cup.

helbus wrote:Media blasting with sharp stuff like garnet, causes millions of pin pricks in the surface of the metal. If it is a thick panel frame or chassis, this is fine. On thinner panels it causes the surface to expand. So when the outside surface gets bigger than the inside metal, the panel warps, or basically trys to turn itself inside out. It is not just a heat issue.

I been telling people that for years, but people insist its all heat.

I have done tons of sand blasting in the past, even I had blasted a part for several min on the same spot its only just warmish.

I warped an aluminum panel in 5 sec to the point as you describe as turning inside out. the middle ballooned out 50mm above the plane of the panel. the panel was 250mm x 400mm off a PC case. And no shit when I said in like 5 sec. There was no heat involved in this.

glass beads is what I was using when this happen.

soda should be fine as long as it doesn't have contamination of other hard media in it.