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Old 04-27-2009, 05:41 PM
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Need Advice - SMALL Bumper Repair -

I need some advice on how to fix up this small damange on a front bumper that has already been repainted.

I have some painting experience however, I have never done a blend and I am not sure what type of BC / CC was used on the repaint. I can find out if necessary.

Any advice on how to putty the crevise in the bumper?

My game plan:

Sand area down with 80 / 180.

2 coats SPI epoxy primer

3M Piranaha Putty

Sand 180 / 320

2 Coats of 2K Primer

Wet Sand 400

2 coats Spi Epoxy Primer

Wet Sand 600

BC/CC/Blending Agent ?

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Old 04-29-2009, 10:46 AM
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Sounds like a good plan, probably even more steps and better
than most would do.
Just remember to use an adhesion promoter on any exposed plastic before
painting over with primer. Bulldog is a popular one and can be bought
in a spray can at WalMart (pretty cheap)
It also helps on blending the color if you spray some over the surrounding
area before baseing.
Also, any putty needs to be the flexible kind, made just for things like

It's always best to clear the entire bumper, but you can blend a small area
like that. the blender is sprayed over the edge of the last coat of clear to
help melt it in. some just use a slow reducer, I like one by DuPont called
"blender" and use it a lot.
There's also some in aerosol cans, but I get better results with my spray
gun so I buy it in a qt can.
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Old 05-03-2009, 01:02 PM
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Ater some hand sanding this is what I am left with:

So from here:

Bullldog Adhesion Promoter

1 Coat Epoxy Primer

3M Piranaha Putty <---Do you guys think putty is needed or can the 2K primer be built up enough? (This bumper has been repainted before so the layers add up in thickness)

My putty skills are not the greatest, have trouble determining highs and lows....practice makes perfect.

1 Coat Epoxy Primer

BC / CC / Blender

Materials for plan of attack:

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Old 05-10-2009, 03:08 PM
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SPI Epoxy Primer reduced 20% to lock in filler / primer work
600 Grit

3 Coats of Dupont Chromabase
I dont like the lines I have, first time doing a blend...should my edges be more feathered? I rolled back my masking paper in order to avoid a hard edge but it still does not look right.

First Coat SPI universal clear

Final Results (1 hr after painting, still more cure time needed)

I used dupont clear coat blender to try and melt in the blend lines. It's my first time using it so I am going to need to experiment a little bit more with the product

Would love to hear come critques. I ended up with a decent amount of orange peel...I was shooting with a 1.4 MM LPH 400 30lbs of pressure at the gun fluid knob turned out 3 turns and the fan close to wide open. Gun was about 4-6 inches from the surface
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Old 05-10-2009, 07:58 PM
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Good job for your first blend. I would have feathered the base into a wider area to help make the edge less noticeable. Also, in my opinion it is worth the time and material to clear the whole bumper or at least to a point where you don't have to worry about melting in an edge on the clear.
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