In between coats, is it best to go down through the grades of paper when flatting?
i'e not just flat the previous coat, with the highest grade used in each stage? If that makes sense!
Chris
Painting and flatting?
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Plasticman
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Ah well Chris, this depends on what you are applying, first lot of primer/undercoat 180-220 wet dry, subsequent 220-400, prior to gloss/top coat of any type then 800 wet,
in the good old days of cellulose then subsequent coats nothing coarser than 1200.
As a rule think about it this way the coarser the paper you use the deeper tha scratches and the more work will be required with subsequent finer grages,
And allways wet flat undercoats/paints.
Mike
in the good old days of cellulose then subsequent coats nothing coarser than 1200.
As a rule think about it this way the coarser the paper you use the deeper tha scratches and the more work will be required with subsequent finer grages,
And allways wet flat undercoats/paints.
Mike
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AngeloEvs
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I usually use 400 between the first and second coat and then 600/800 and finally 1000 before applying the final coat. Much depends on the type of paint you are using and the 'quality' of the finish of the applied coat and whether you have specific problems such as overspray, runs (knife them!) blooming, orange peel,etc. Use soapy water and sanding blocks for flat panels and roll the wet n dry for curved surfaces, take care at edges as the paint is always thinner.
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AngeloEvs
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If its applied properly it doesnt generally need flatting. There are different grades of compound but thin it down with a bit of T-cut and apply it wet and don't allow it to dry. Leave the paint to naturally harden, a week is good, longer is better. If you are getting good results with your method stick with it.
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Chrissyt
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Have left the bumper to fully harden.
I've had a small what looks like reaction on a few areas of a panel I've painted. Only primer at this stage, is that because of grease etc on the panel, or previous paint reacting? It has had paint in the areas that have reacted, so bare back to bare metal?
Chris
I've had a small what looks like reaction on a few areas of a panel I've painted. Only primer at this stage, is that because of grease etc on the panel, or previous paint reacting? It has had paint in the areas that have reacted, so bare back to bare metal?
Chris
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AngeloEvs
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No need, get some primer sealer (halfords or any good paint factors). Flat back to iron out the wrinkles then spray the primer sealer (its also a very good filler/leveller), flat back again. If you go 'through' put another coat of primer sealer and then your normal primer if you want. Spray can is best for you but you can brush it on. Other remedy is use anti rust primer available from any good motor factors but usually have to brush it on.