Cracked bumper, how to fill and respray?
Cracked bumper, how to fill and respray?
Author
Discussion

Laura877

Original Poster:

25 posts

109 months

Wednesday 23rd August 2017
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So now I've finished the 'easy' job of sanding out the horrid paint disaster from previous owner, I now face problem 2 - which may be a little harder, a crack in the rear bumper.

I have looked into just getting a new bumper, but because the colour is 'rare' it's proving difficult; so I'm wondering wether it's Worthing filling it over, priming and respraying - in which case how do I do this and what products do you recommend?

Picture attached, many thanks!

V8covin

9,432 posts

217 months

Thursday 24th August 2017
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It needs sanding back.You can't fill cracks in for a permanent repair.
The cracks may just be in the paint or there could be filler underneath that is also cracked or even in the plastic bumper itself in which case it would need welding

Laura877

Original Poster:

25 posts

109 months

Thursday 24th August 2017
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So how do I do this, what grit do I need? Filler etc

V8covin

9,432 posts

217 months

Thursday 24th August 2017
quotequote all
Laura877 said:
So how do I do this, what grit do I need? Filler etc
You want me to tell you how to do a repair from start to finish ?
I take it you have no experience of repairing bodywork ?

Laura877

Original Poster:

25 posts

109 months

Friday 25th August 2017
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No, I want you to give me the basics.

And no, I haven't, but how am I supposed to learn if people like you belittle everyone whenever they want to try and do something themselves.

Squiggs

1,520 posts

179 months

Friday 25th August 2017
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I don't think you're being belittled ..... but I do think you're expecting a bit much!

Some people pay for weeks/months worth of intense training courses, others go to college and some take on long apprenticeships to learn how to successfully and professionally repair that kind of damage.

For them to then explain everything that they learnt as to what is needed and how to carry out this kind of repair as an accurate step by step guide could take at least a months worth of typing.
Whilst some people can and will offer free advice for small simple fixes not many will have the time, patience or qualifications to become a free personal on-line tutor, enabling a novice to take on larger, more technical and more complicated repairs.

V8covin

9,432 posts

217 months

Friday 25th August 2017
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Laura877 said:
No, I want you to give me the basics.

And no, I haven't, but how am I supposed to learn if people like you belittle everyone whenever they want to try and do something themselves.
This is why I rarely give advice on here.
I wasn't belittling you,I was trying to ascertain if you had any experience...... I was going to suggest some YouTube videos .


Laura877

Original Poster:

25 posts

109 months

Friday 25th August 2017
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And some people, just out of the kindness of their heart understand some people don't have the time nor money to A) go to college to learn how to professionally complete or B) pay for it to be fixed by a pro, and instead give a quick explanation on what they need and what they should do.

I don't expect it to be perfect.. I'm not a professional, it's not just down to the tools but down to the person holding them, but when I'm raising a family single handedly and would like to learn how to do this kind of thing because I can't afford for it to be fixed by a pro, it's just nice learning from people who don't mind giving information.

Not to worry. Thanks anyway!

Squiggs

1,520 posts

179 months

Saturday 26th August 2017
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Ok ....

Panel wipe the whole bumper.
Prep the whole bumper with 2000 grit and then panel wipe
By block start with 80 grit working through to 400 (maybe up to 1000 depending on what primer you're using)
By the time you've finished the whole of the top and some of rear facing surface should be feathered out with no sign of any cracks or any defects visible
Clean with panel wipe and then tac rag.
Apply a thin film of adhesion promoter to the areas that are now bare plastic.
Tac rag
Prime the areas covered by adhesion promotor and cover all other sanded areas.
Flat the primer with 800 (maybe up to 1500 depending on what paint you're using) without breaking through the primer.
Tac rag.
Cover the primer with paint.
Tac rag.
Lacquer the whole bumper (unless you've got fade out - in which case you could finish lacquering at the corners and then fade)
Any nibs can be dealt with by wet sanding from 1500 trough to 4000
Machine polish to your desired effect.

Job done

HTH thumbup

Crack on biggrin

Laura877

Original Poster:

25 posts

109 months

Saturday 26th August 2017
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Thanks so much, that's very kind and useful information ☺️ Have a nice weekend