discussion Vellejo Primer peel...

[Andy2035]

Hi all,

Just wondering if I could pick your brains please, has anyone any idea why this is happening please...: -

I was starting to sand it down but for some reason the primer just wants to peel off, surface was fully cleaned down etc before hand...

Thank you in advance for any help...

 

[Guest]

might be a dumb question but is that plastic or metal you are priming over

 

[Ian M]

Looks like a metal car. If the metal was clean and keyed and degreased, I have no idea why that has happened!

The bare metal does look very shiny, I thing that it might of just needed a better key for the paint to grip onto-

Ian M

 

[Andy2035]

Thanks for the reply chaps, it does look shinier than it is, think I night pop to my local parts shop and get a tin of auto primer and give that a try, never had this problem with it before and I prepared it the same way, full strip down again I guess...

Thanks again...

 

[HAWKERHUNTER]

I dont know how lomg you left it before trying to rub it down but it looks like the primer hasnt cured properly. Also if you are not doing so already use some water as you are rubbing down. It helps to take some of the heat out of the sanding process. Good luck.

 

[Andy2035]

Hi Steve,

Thanks for the reply, I always leave them at least 48hrs before touching them and I do use water, although I have sometimes had a reaction when doing so, it sometimes bubbles up, which this one did the first time, if it hadn't I'd of been ok as the primer had taken, so I had to strip it all donw again and re-do it only to have this happen...

Thanks again all for the replies, it's very much appreciated...

 

[Guest]

Andy looking at it it looks a very heavy coat of primer. I always put a mist coat on first followed by a covering coat. But thick just enough to give cover. Also if I wet & dry, if it needs it, I use a very fine 1500gauge paper with loads of water as Steve has mentioned.

Missed the main point. Just wonder if Vallejo Acrylic primers are compatible with metal. Worth asking the question to the Vallejo customer department with a copy of your photo. If you do if you could pass on their message.

Also a help is to use Colin's (CDW ) method of agitating the pieces of the model in a container filled with bird grit. Gives a great matt very smooth finish.

Laurie

http://www.acrylicosvallejo.com/en_US/contact

 

[Andy2035]

Hi Laurie,

Thank you for the contact link, have just sent them a message, so will let you know what they say...

Andy...

 

[yak face]

If youre going to try a different primer andy ,you cant get much better than the halfords acrylic grey. Lots of people on here use it ,myself included, some use the grey acrylic primer formulated for plastic , I use the standard grey acrylic primer (its a bigger tin for the same money, im from yorkshire!LOL) and have never had any problems. I imagine as its intended for use on cars that it should go on metal no problem , cheers tony

 

[Guest]

would red oxide primer be better for metal

 

[Guest]

would red oxide primer be better for metal

technically yes. you could have thin coat of red then give a coat of grey so you get a nice base for your colour (unless you're spraying red/orange of course)

as a matter of interest there's some cheap cans of grey primer in the discount UK shops which is brilliant for a quid. used it for my prometheus model and it gives a great finish.