V Cutting Tape

[Leadhead]

I would welcome any recommendation for self adhesive tape or sheeting to retain, as far as possible, the integrity of the outline being "V" cut. In order to spray colour into the (masked) cavity.
Have tried various green and white masking 'tapes as usually advised, but the result is very poor. Also used s/a heat shrink (useless).
If you have the secret and would share. I would be most grateful.

[Boyan Silyavski]

What exactly you are trying to do? Its not done this way. Is it wood?

I have tried all possibilities and here is my advice if wood, as possibly all other scenarios lead to a fault or mediocre quality:


1.V carve
2.Sand a bit the edges and clean the V channel perfectly
3.Find the best quality and fastest dry impregnation lacquer for outside wood. Best works water based urethane.
4.Paint more or less, paint back if needed, paint sides if needed. Dont care for inside of channel

5 Let dry recommended time

6. Use only 2 component Urethane paint. MIx and paint the channels without caring if you make all thing dirty.


7.Let it dry for a couple of hours

8. Sand directly with 100 and up sander. If you have a good sander thats it. If not sand up to 240.

9. Arm yourself with a sponge and apply finish with careful brushing movements so as the paint or lacquer not to go in the channel



For metal:
use only 2 component base and paint. Sand face down on flat plate, do not use polisher. Or if using polisher, do that after the base , then spray color and then fast clea with acetone very carefully the polished part that need to be seen.



Here is an illustration of the process. In fact exactly what i am doing today:

[Leadhead]

What exactly you are trying to do? Its not done this way. Is it wood?

I have tried all possibilities and here is my advice if wood, as possibly all other scenarios lead to a fault or mediocre quality:


1.V carve
2.Sand a bit the edges and clean the V channel perfectly
3.Find the best quality and fastest dry impregnation lacquer for outside wood. Best works water based urethane.
4.Paint more or less, paint back if needed, paint sides if needed. Dont care for inside of channel

5 Let dry recommended time

6. Use only 2 component Urethane paint. MIx and paint the channels without caring if you make all thing dirty.


7.Let it dry for a couple of hours

8. Sand directly with 100 and up sander. If you have a good sander thats it. If not sand up to 240.

9. Arm yourself with a sponge and apply finish with careful brushing movements so as the paint or lacquer not to go in the channel



For metal:
use only 2 component base and paint. Sand face down on flat plate, do not use polisher. Or if using polisher, do that after the base , then spray color and then fast clea with acetone very carefully the polished part that need to be seen.



Here is an illustration of the process. In fact exactly what i am doing today:

Boyan - Thanks for information. I have to paint the whole surface first. Then cut through with the v cutter. Then spray contrasting colour onto engraving. Then remove tape/film. I also use water based emulsions and cover with urethane after removing all remaining film.
Regards
Rod

[Boyan Silyavski]

Boyan - Thanks for information. I have to paint the whole surface first. Then cut through with the v cutter. Then spray contrasting colour onto engraving. Then remove tape/film. I also use water based emulsions and cover with urethane after removing all remaining film.
Regards
Rod

No, what i am suggesting is more precise. There is no need for tape. Paint will go under the tape and into the wood! hence better is to impregnate wood and then paint channel. Then sand excess. I have that constant conversation with a printer guy friend of mine when he tries to teach me that i have to use tape and me that is better without tape.

Plus there's that detail that you have to sand inside channel or clean with flat screwdriver before coloring and priming. The tape will not permit that or will roughen and then coor will go where is not needed in wood.

I have tried all and what i say works 100% perfectly. I don't have more time for experiments... It works also just V cut clean and paint, but then sanding is more time and trickier if you have 1mm grooves like that on picture below. In fact on that images you will see that i used different method for each plate. result was same just i lost 2 1mm lines and had to do them by hand later.

And use bicomponent paint otherwise you could be testing the destiny. Once only i used bad paint on 30 signs and had to repaint them 4 times.

[Leadhead]

Boyan - Yes but your Z0 surface is plain. I have to paint my whole Z0 surface first and then cut in. I could then hand paint in the v cavity. But I generally like to airbrush.

[PaisleyPCdoctor]

Would it be possible to deliberately carve slightly too deep (say 0.2mm for talking sake), paint the cuts, then mill the 0.2mm off the whole surface with a clearing bit?