Finishing parts


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Davidpetty1988
Davidpetty1988
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Hi to all, just a quick question or two on peoples opinions and methods that they use for finishing there parts.
I already have a fairly glossy finish after demoulding.
So...
  1.  On my first test peice I intend to use a clear automotive laquer from a spray can. Any input on what grit sand paper pre and post laquer and how many coats much appreciated.
  2. On my second I wish to use easygloss polishing compound once again any input on pre sanding application grits or anything like that or tips for applying the easygloss.
  3. Just bare no coating just a sanded finish tip on grits and what not.
  4. And lastly any other ideas that anyone put forward would be great such as gel coating or any thing else.
Thank you in advance

Keep on carboning
ChrisR
ChrisR
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When I finish with a PU spray, I sand  P80 (to knock any irregularities etc off) , P120, P180, P240 then P320 before spraying. When I do this I'm not looking for a polish finish, just a dull uniform finish to allow the PU to key into.

If i'm polishing the part with no finish I just work up the grits to wet sanding until I'm happy with the finish then buff with a machine buffer & compound
Davidpetty1988
Davidpetty1988
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Thanks for the input and info Chrisr what pu spray do you use?
Also any links to threads or topics I should read ?
Thanks 
Dave
Edited 8 Years Ago by Davidpetty1988
ChrisR
ChrisR
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Mainly rattle can but when I want the really nice durable finish I use Duraclear 2K done at the local spray shop - doesn't get done very often as I need to batch stuff with them otherwise it's not economic
davro
davro
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Hi David,

I always spray 2K clear coat on my car parts mainly, I never use 1K any more as my sprayer friend just mock's me lol! so I have setup a small spray booth with a carbon filter and have a decent professional mask that I use.

Really depends on the finish and depth of shine your after, if your just after giving it some UV protection then I suppose 1K is ok'ish, but I don't bother with 1K or 2K rattle cans any more.

Sanding depends on the resin finish and how long you leave between layer coats and how many high/low spots and pin holes.
I like to key in with a 300/400/500 grit and then get 3 decent layers down flatting back on each layer 1000/1200/1500 grit
Then another 3-4 coats flattening back with 2000/3000 and then if you invest in a good gun (£50 DeVilbiss SLG 610 low pressure) and average air compressor with a little practice you will get a good final finish straight from the gun Smile

But it depends what your application is ...



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Edited 8 Years Ago by davro
Davidpetty1988
Davidpetty1988
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Thanks for the input boys will post some picys when I've finished . anyone got any experience with the easygloss polishing compound? Will probably have to wait for warren or matt for some advice on that.

Dave
Hanaldo
Hanaldo
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The Easygloss is very straight forward, just follow the instructions on the bottle. I do find it works better when applied with a soft pad on a RO polisher, but by hand works too. 
Davidpetty1988
Davidpetty1988
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Thanks hanaldo I've seen your name pop up loads in topics,you seem like a very wise person and full of composite knowledge.
Thanks 
Dave 
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