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geekhack Projects => Making Stuff Together! => Topic started by: kenmai9 on Sat, 29 June 2013, 18:52:51

Title: VHT Vinyl dye on my QFR leaves some spots with white blotches/residue
Post by: kenmai9 on Sat, 29 June 2013, 18:52:51

I just vinyl dye sprayed my QFR and after drying there has been some white residue/blotches on parts of the board.

Does anyone have any tips on what I can do to get rid of these? I might do another coat next week, but I'm not sure if it will help.

These guys at this forum  (http://forums.shoryuken.com/discussion/59961/painting-the-fightstick-with-krylon-or-vinyl-dye/p11)have suggested sand papering it with canola oil. What do you guys think?

Title: Re: VHT Vinyl dye on my QFR leaves some spots with white blotches/residue
Post by: Photoelectric on Sat, 29 June 2013, 19:02:08

It looks to me like it's reacting with the the rubberized QFR coating underneath or maybe does not like the plastic (if it's black QFR--I don't know if it's rubberized, I only painted a silver QFR)...  I don't think more coats would help, personally.  Did you prep the surface underneath properly?  Any dirt / residue of anything under the paint?  I would just remove all of that paint (not sure how--I'd look up how to remove vinyl paint or just use 400-grit sandpaper and then finer sandpaper to go around edges, like 600-grit) completely and redo with something else.  Either an oil enamel or some good acrylic enamel.

You can see on your photo that it's not white splotches--it's the whole paint layer going bad, very porous, and drying in a weird way.

P.S.: at worst, you could buy a new top cover from the CM store and paint with something other than that VHT Vinyl paint.

Title: Re: VHT Vinyl dye on my QFR leaves some spots with white blotches/residue
Post by: kenmai9 on Sat, 29 June 2013, 19:04:13

Quote from: Photoelectric on Sat, 29 June 2013, 19:02:08

It looks to me like it's reacting with the the rubberized QFR coating underneath or maybe does not like the plastic (if it's black QFR--I don't know if it's rubberized, I only painted a silver QFR)...  I don't think more coats would help, personally.  Did you prep the surface underneath properly?  Any dirt / residue of anything under the paint?  I would just remove all of that paint (not sure how--I'd look up how to remove vinyl paint or just use 400-grit sandpaper and then finer sandpaper to go around edges, like 600-grit) completely and redo with something else.  Either an oil enamel or some good acrylic enamel.

So much effort. Might as well just buy a new case from CM and try it again. I just read that I didn't have to prep the surface besides cleaning it when I dye it using vinyl dye. There might be some oil under the paint that's causing it. I wonder how the dye would work on a brand new QFR case. Damn that rubberized crap!

EDIT: So after a day of drying, I decided to try to rub out the white residue with a microfiber cloth and soapy water. I rubbed for probably 30 minutes and eventually the white residue subsided!! Woop

Here's some pics! You can see the texture closely in the photo. I think that texture is a result of my poor spraying. I might have done a layer too thick. So remember to spray light layers!! Not a bad result for my first time painting/dying.