I have been overlaying parts made out of metal for almost a year now, recently few cusomters have said that there carbon fiber parts has turn completely black after a few days.
Using Silimar 249 resin and MKEP from uscomposites, then sand to 800 grit then clear coat with R-M 1K clear coat 3-5 coats then wet sand to 3000 grit then machine buff, part look great but why are the parts turning black.
Could it be BAD batch of resin?
Thanks for any help.
post pics if you can
Bare metal or painted metal parts overlaided?
Brand NEW OEM parts from dealer, not painted, they come black.
Well, black on black is black!:o
Seems obvious that you need to seal the parts before doing the overlay. I dont feel OEM parts are likely to be bare metal, so whatever is on them is reacting with the resin you are using.
Hmmmmmmmmm
Only because I had a huge failure with the BLACK TEXALIUM do I think maybe I know something different.
Are you maybe losing adhesion with your resin?
I couldnt make the black tex work for anything. No matter how thin the resin I used it wouldnt show the weave pattern. It would look like a gloss black part. It was totaly bizzare to say the least.
I wont be buying anymore black tex…thats for sure.
Black texalium is in effect glass fibre thats been dyed black, so there isnt a lot of hope of making it look good cosmetically.
Silver eglass looks good due to the fact that its been sprayed with aluminuim. Weavers in Italy have been attempting for some time to make something that looks like carbon, but is much cheaper…After all there is not a great deal of point making cosmetic parts with real carbon, if a good lookalike material was available.
Agreed.
The black does suck but black tex is covered in aluminum as well its just annodized black aluminum powder instead of raw aluminum.
The two cloths are identicle in feel and weight…just you cant really use it for anything. Im glad I only bought a half roll of it and Im almost done using it as backing layers and what not.
The silve is great except for the tex problem with flexing and being confroming. Over the last year though Ive made tons of progress with using it. I have to, I have tons left.
Now I just need to work on my micro bubbles that get trapped from infusion and the sometimes problem of chipping or bubbles at the edge of my parts.
I think its just me not using enough gel coat at the outer perimeter of my parts though…thin gel chips easily.
simple fix there, turn it over 
one side will show as a solid black and the other will be the graphite color with weave.
Ive used it and no it doesnt look anything like the real carbon. At best its a grey color.
I have so many people asking me about black…its retarded. The only way to go “black” is to use the real carbon fiber…and it sucks.
Im with classic, I dont see the reason to spend the money on carbon when all of my parts are cosmetic. Its a shame they cant make a cloth to mimic it.
I’m just using common sense here when I state that the blk glass was produced to be MAINLY used as a dark CF reinforcement backing laminant…not as a surface anything.
SO it was designed for those of you who don’t require the CF 2nd and 3rd lay up…but rather a cosmetic,weaker part.
It should work well for this.
As far as the blk infusion problems…almost sounds as if the color or dye is reactivating and mixing with the resin ??
…V’