GavinJ
Club Retro Rides Member
MGB 3.9 v8 Sebring
Posts: 927 
Club RR Member Number: 209
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Cutting Compound and Polish?GavinJ
@gavinj
Club Retro Rides Member 209
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May 25, 2013 20:56:40 GMT
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Hi guys, Finally got all of my MGB in paint, its painted in celly and we have achieved a really good finish straight out of the gun so i'm hoping its not going to take much cutting back to get it spot on. It has very slight orange peel, that i'm going to tackle with 1200-1500 grit - but not really clued on the different cutting compounds out there and the best polish to use to protect it all? Is it possible to cut it back by hand or is a machine polisher the best option? (bit scared of cutting straight through the paint!! especially on the edges of panels etc.) if so what heads do I need? Any tips and hints would be great  |
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I'm certainly no expert on refinishing body pannels but you'll probably find you'd require something with a bit more bite than 12-1500 wet'n'dry. Would have to start with something more like 600.
As for protecting polish... there are a few companies out there who sell specialist polishes which can be applied to new paint so the products are out there... just couldn't really point you in the right direction as never got that far myself.
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Definatley do not try flatting with 600 grit!
Use 1200 on a block with plenty of soapy water to prevent it from clogging. The your best bet is to use a mop with a good quality cutting compound to polish it. I always farcla g3 and farcla g mops. Just because that's what all the painters I know use.
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R.S. Autotech. Servicing/Repairs/Diagnostics.
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Also you will burn through the edges very easily. Might be worthwhile painting a few scrap panels first to practice on until you get a feel for it.
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R.S. Autotech. Servicing/Repairs/Diagnostics.
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May 27, 2013 10:29:08 GMT
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I've done many DIY paint jobs with celly. Celly is soft so don't go mad when flatting. It looks like you've got a good finish off the bat so it doesn't need LOADS of flatting. Get some warm water with a bit of car shampoo in it and flat it with 1500 followed by 2000. You can get away with just 2000 if it's only light orange peel. On flat areas use a block and for curved etc just by hand. Obviously, if the finish is like the surface of the moon you need to go to lower grades and work your way up. I've always used Farecla G3 with a foam mop head. There are other products such as Autoglym 03B. Use plenty of water in a spray bottle with the G3 so it doesn't burn. If you're not used to mopping, make sure you use one with adjustable speeds so you can start slowly. As has been said, be careful at the edges of panels and it also pays to mask off handles and rubbers etc as they can easily be burnt by the mop. Once you've mopped it up all up nice, use a good hand glaze followed by a quality wax. Try and polish it regular as this will also improve the finish as time goes by. It can be very time consuming but once you've done it, it will be worth it and will look top notch once you start putting the brightwork back on  |
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1993 Mercedes-Benz 190e LE in Azzuro Blue.
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May 27, 2013 10:29:52 GMT
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Probably better to steer clear of the electric polisher. They do rub thorugh edge pieces in seconds if you're unlucky.
As for which grade of paper to use, I guess really it depends on how deep this orange peel is. We could both be right.
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May 27, 2013 19:44:14 GMT
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Would it be an idea to wait for it to go properly hard before flatting, like in a couple of weeks time? I could be way out here though so i'm sure someone will correct me....
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GavinJ
Club Retro Rides Member
MGB 3.9 v8 Sebring
Posts: 927
Club RR Member Number: 209
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Cutting Compound and Polish?GavinJ
@gavinj
Club Retro Rides Member 209
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May 27, 2013 21:18:53 GMT
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Fair comment Dodge, had looked into this on some google searches and your right, but luckily the shell has been painted a couple of weeks now and the doors and tailgate that I've recently painted I've been able to make use of the sun and them nice and warm outside so should be ready to go. Cheers for all the advice guys, will get myself some g3 and think I'm going to tackle it all by hand there is no major orange peel |
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Make sure you get the compound for celly as it does differ from that for 2k & basecoat/lacquer.
It's advertised in any good paint supplies.
Machine polisher gives a great finish but if its a one off can be a bit of a waste of cash although you can get them for £70 these days which is a steal.
A d/a version is a much safer thing to use but a lot pricier,just take your time with it and you'll be ok,plenty of water if your on the paste.
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