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Help With Spraying My Plastic Bumpers

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Old 20-03-2012, 04:07 PM
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Gaia
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Default Help With Spraying My Plastic Bumpers

Hi,
I have a white Ford Fiesta Encore 1.3 1998. Some of the paint has come off both bumpers. I'm intending to get a can or two of Ford matching paint and primer from Halfords.

Can someone explain the steps I need to take to spray up the areas where the paint has come off? Spraying the primer on the area concerned, then the white top coat on that seems straightforward enough. I think.

I'm wondering though, about flatting down to provide a key? What grit, wet or dry? Don't the flatted sanded area and the sprayed primed area need to be exactly the same size and how do I do that? If I sand an area and then prime it, but say if there is a 1 inch over spray boarder around the flatted area, will the primer not adhere there, and the scratch marks will be visable?
I know what I mean but is a bit hard to explain.
Also same as painting a door where paint has flaked of, will be an uneven surface and the flaked areas will be clear even though has been painted.
Will I have same sort of problems with bumpers if so, how do I avoid.
Cheers.
Old 20-03-2012, 04:37 PM
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dingla rs
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first off you need to sand the area back were the paint has come off till there is no edge ,1200wet an dry will be fine or 800 ,you need to flat past the arear you intend to primer and dont prime rite up to ur taped edge so when you flat the primer down you wount be left with a edge ,also you will need a plastic primer
Old 20-03-2012, 04:39 PM
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Firstly you will need plastic primer, colour paint, then laquar.

I'd recommend 800+ wet and dry, used wet.

Flat down the area quiet a good way around the area, dry, spray primer, wet flat, dry, colour, laquar, wet flat and polish

Use finer grades the further along the spraying process you are, you may need filler primer depending on how deep the scratch is, in witch case, use after you've flatter the plastic primer down, then flat that down before colour.

One more thing, mask off the area not to be sprayed, try and tie this into lines of the car if possible, note the colour will be more vivid as it's not exactly matched to your car, the whole bumper will need flagging and polishing to help it blend in

This is based on my limited knowledge of spraying so don't take it as gospil
Old 20-03-2012, 06:08 PM
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Originally Posted by dingla rs
first off you need to sand the area back were the paint has come off till there is no edge ,1200wet an dry will be fine or 800 ,you need to flat past the arear you intend to primer and dont prime rite up to ur taped edge so when you flat the primer down you wount be left with a edge ,also you will need a plastic primer
OK ta very much.
I follow what you say up to here. " you need to flat past the arear you intend to primer and dont prime rite up to ur taped edge" I don't quite follow you here, could you explain more clearly to me please?
Cheers,
Peter.
Old 20-03-2012, 06:15 PM
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Originally Posted by jammerrs
Firstly you will need plastic primer, colour paint, then laquar.

I'd recommend 800+ wet and dry, used wet.

Flat down the area quiet a good way around the area, dry, spray primer, wet flat, dry, colour, laquar, wet flat and polish

Use finer grades the further along the spraying process you are, you may need filler primer depending on how deep the scratch is, in witch case, use after you've flatter the plastic primer down, then flat that down before colour.

One more thing, mask off the area not to be sprayed, try and tie this into lines of the car if possible, note the colour will be more vivid as it's not exactly matched to your car, the whole bumper will need flagging and polishing to help it blend in

This is based on my limited knowledge of spraying so don't take it as gospil
OK thanks for that. What other grits of paper should I use?
" laquar " I thought the Halford paint would be a gloss do I need the laquere? Again polish, do I need it? I just want to tidy the car up, not put it in a show sort of thing.
Thanks mate,
Peter.
Old 20-03-2012, 06:26 PM
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Originally Posted by Gaia
OK ta very much.
I follow what you say up to here. " you need to flat past the arear you intend to primer and dont prime rite up to ur taped edge" I don't quite follow you here, could you explain more clearly to me please?
Cheers,
Peter.
if your just priming the bumper you normly mask off the arear that you dont want paint on or primer like this altho its just a guid to show you what i mean

Name:  479.jpg
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so thats first set flat arear down thats flaking with 800 till there is no edge ,mask the arear off so no primer gets on wing ect ,plastic prime ,dosnt need sanding at all then primer witch will need flatting ,flat the old paint to the nearest edge or line remask and put the topcoat on
Old 20-03-2012, 07:10 PM
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Originally Posted by dingla rs
if your just priming the bumper you normly mask off the arear that you dont want paint on or primer like this altho its just a guid to show you what i mean





so thats first set flat arear down thats flaking with 800 till there is no edge ,mask the arear off so no primer gets on wing ect ,plastic prime ,dosnt need sanding at all then primer witch will need flatting ,flat the old paint to the nearest edge or line remask and put the topcoat on
I'm with you. Will post pictures of bumpers Wednesday, so you can see more clearly areas I need to tidy up. I got new numbers plates and wheel trims the other day from Ebay, really good price. Also a replacement wing mirror unit that I need to spray. I know very little about cars, but you guys really do, awesome
Cheers.

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Old 20-03-2012, 11:48 PM
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Dont apply too much pressure to your sand paper! You only want to key the surface if you apply too much pressure you will see the scratches.
Old 21-03-2012, 06:39 AM
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Try and use a sanding block where ever you can to reduce any uneven flatting
let the paper do the work. Dont press too hard
and use washing up liquid in your water to help lubricate the paper.
Old 21-03-2012, 12:24 PM
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Originally Posted by whizzisat114
Try and use a sanding block where ever you can to reduce any uneven flatting
let the paper do the work. Dont press too hard
and use washing up liquid in your water to help lubricate the paper.
OK thanks, uploading bumper photos now.
Old 21-03-2012, 12:29 PM
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Originally Posted by MikeyRobbo
Dont apply too much pressure to your sand paper! You only want to key the surface if you apply too much pressure you will see the scratches.
Cheers, uploading photos of bumpers.
Old 21-03-2012, 02:12 PM
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Default Fiesta Encore Bumper Photos Link

Hi,
Here is a link to bumper photos.

http://s807.photobucket.com/albums/y...mper%20Photos/

Wet and dry what grits and how many sheets to do the work? One bumper on corner is scuffed with scratches, in front bumper crack on top in two places, see ringed pictures. Also some rust on rear cills. How do I remedy these problems and what materials, products do I need to get, from Halfords or other motor factor.

Wing mirror needs tidying, replacement unit for other side needs painting. I have several sheets of good stout wrapping paper, thought much better than newspaper, that might allow bleed through, even if doubled up, fathing about trying to double up and stick down with masking tape. I have some Wickes 1 inch wide decorating masking tape, assume OK to use this.
All help and tips on this, much appreciated, I really havn't a clue.
Cheers,
Peter.
Old 21-03-2012, 09:21 PM
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Default Fiesta Encore Bump;er Photos

That link was bad, I'll try again.
http://s807.photobucket.com/albums/y...mper%20Photos/

Yeah that seems to be working OK.
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