Author Topic: Block sanding questions????  (Read 722 times)

Offline bentpshrods

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Block sanding questions????
« on: April 16, 2009 - 03:40:42 pm »
   A few more questions for you paint guys. I have started on the first round of blocking out my car. I put on a quide coat and started with 180 grit and  tried not to over sand everything---but to get an idea of the high and low areas. On a few areas ---mainly on some corners I went down to bare metal.  Do I need to shoot these spots (bare area)  with the EPOXY primers first ---then another shot of high build(2K) on top of the epoxy--or can I just hit these bare areas with the 2k as I try to fill in some of the low spots.  When trying to fill in the low spots on say my fender---do you just spot shoot the low place with 2k and re block or would you shoot the whole fender and do a little thicker spraying  in the lows.   Can you put down to many coats of primer???  The car for the most part is really straight but the trunk lid showed a lot of waves thru it that I didn't see tell after I started to block it. Should I strip it back to bare metal and then skim coat it or can I just ruff the primer thats on it now with 80 grit---skim coat--re prime with 2k and block again.  Figured I would ask a few stupid questions now and save some work that I might have to do over later.  It's been a good learning experience so far---gives a person a new perspective on how much labor is involved in trying to make this pig purty..  I am sure I will have more questions  but thanks for the help so far..   Doug

Offline ntstlgl1970

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Re: Block sanding questions????
« Reply #1 on: April 16, 2009 - 03:59:46 pm »
 :2cents: I'm no expert but as soon as you get to metal, stop sanding. I would think you need to reshoot the entire area. If there is a low area, I think you would address that with filler prior to priming and blocking.

Some people like working in this order bare metal>epoxy>filler>primer>base>clearcoat, others like this order bare metal>filler>epoxy>primer>base>clearcoat.

This website has a ton of good info: it may take some research but you can get quicker answers there.
70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....