Question for you guys...I soaked all the parts of my kit in soapy dish water prior to priming. I then layed down a beautiful smooth coat of Model Masters Acryl Gray Primer with my airbrush. A few days later I am attempting to mask off some areas of the fuselage, and when I remove the tape, even so slowly (Tamiya masking tape) it seems to lift my primer right off in some places. Should I have done more than one coat of primer? am I using the wrong kind of tape? Whats the best way to cure this problem?
Thanks
redman71
(building 1/48 Tamiya P-47D Razorback)
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Primer Peeling off
redman71
Joined: February 12, 2004
KitMaker: 68 posts
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Posted: Tuesday, March 02, 2004 - 03:52 AM UTC
redman71
Joined: February 12, 2004
KitMaker: 68 posts
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Posted: Tuesday, March 02, 2004 - 07:38 AM UTC
Ok I realize the ways of my error....In the most bone head of moves I failed to lightly sand the pieces before priming. With that being said..whats the best thing to do now that they all are primed? Sand them all, and then re-prime???
Thanks
Thanks
TreadHead
Joined: January 12, 2002
KitMaker: 5,000 posts
Armorama: 2,868 posts
Posted: Tuesday, March 02, 2004 - 08:00 AM UTC
Howdy redman,
You really shouldn't have to "lightly sand" any of your parts before priming. There is something else going on.........was your "soapy" water overly soapy? And did you thoroughly rinse the soapy water off? Because, assuming you masked along panel lines or some such, that is exactly where the soapy residue would build up, allowing your tape to adhere to the build up and not the surface of the fuselage.
hth.
Tread.
You really shouldn't have to "lightly sand" any of your parts before priming. There is something else going on.........was your "soapy" water overly soapy? And did you thoroughly rinse the soapy water off? Because, assuming you masked along panel lines or some such, that is exactly where the soapy residue would build up, allowing your tape to adhere to the build up and not the surface of the fuselage.
hth.
Tread.
MrRoo
Joined: October 07, 2002
KitMaker: 3,856 posts
Armorama: 2,984 posts
Posted: Tuesday, March 02, 2004 - 08:17 AM UTC
I have to agree with tread. more likely to be soap residue left. Did you just soak the parts or lightly brush them with a soft toothbrush? Soapy water by itself without a gentle 'scrub' will not lift all the mold release off in some cases. 
redman71
Joined: February 12, 2004
KitMaker: 68 posts
Armorama: 0 posts
Posted: Tuesday, March 02, 2004 - 09:30 AM UTC
I filled the bath tub with some warm water, and put a bit of Palmolive in the water... I let them soak for a few minutes. I didnt scrub with a toothbrush, but I did rinse them off well, and let them dry out completely. Actually where the primer is lifting is right below the canopy on the side of the fuselage. I need to mask the area off that the cockpit fits into, as it is a different color from the main fuselage...Should I maybe try a different tape? Not sure what to do
Merlin
Senior Editor
#017
Joined: June 11, 2003
KitMaker: 17,582 posts
Armorama: 903 posts
Posted: Tuesday, March 02, 2004 - 09:55 AM UTC
Hi there redman
I don't want to get into brand names, because they differ everywhere...
When you say soap, do you mean body soap or pure dish-wishing detergent? You need the latter... (body soap in the UK would be a disaster!)
If you really want to be safe, swap the model with Isopropyl Alchohol ( I think it's called de-natured in the US) before painting.
Hope this helps
Rowan
I don't want to get into brand names, because they differ everywhere...
When you say soap, do you mean body soap or pure dish-wishing detergent? You need the latter... (body soap in the UK would be a disaster!)
If you really want to be safe, swap the model with Isopropyl Alchohol ( I think it's called de-natured in the US) before painting.
Hope this helps
Rowan
MrRoo
Joined: October 07, 2002
KitMaker: 3,856 posts
Armorama: 2,984 posts
Posted: Tuesday, March 02, 2004 - 11:28 AM UTC
Quoted Text
I filled the bath tub with some warm water, and put a bit of Palmolive in the water... I let them soak for a few minutes. I didnt scrub with a toothbrush, but I did rinse them off well, and let them dry out completely. Actually where the primer is lifting is right below the canopy on the side of the fuselage. I need to mask the area off that the cockpit fits into, as it is a different color from the main fuselage...Should I maybe try a different tape? Not sure what to do
you did not clean the parts enough and there is still demold grease on the plastic. My suggestion is to spray the model with ovencleaner to strip all the paint and then wash it again useing dish washing liquid and a soft toothbrush. Then paint again. A different masking tape is not going to work as the Tamiya tape is low tack tape.
TreadHead
Joined: January 12, 2002
KitMaker: 5,000 posts
Armorama: 2,868 posts
Posted: Tuesday, March 02, 2004 - 04:02 PM UTC
Howdy redman,
I agree with both Merlin and 'Roo. Although I admit it's at least a bit of a surprise that a Tammy kit would be a problem. They are usually pretty darn good about getting rid of their mould release agent before packaging. But accepting that as fact (because it IS your fact).
Do what 'Roo said, defintely! Reason being is, no matter what you do to the model from this point on is 'suspect'. Very important. Believe me, you do not want to go through all the other painting steps only to have the same thing happen......get the picture.
Now, do what 'Roo says and Strip it!
Wash again with soapy water (using an old soft bristled toothbrush) and wipe clean. Now (because you used the oven cleaner), wipe throughly with a lint-free cloth dampened with Iso alcohol. Let dry. Wipe again.
Now, start your painting process.
hth.
Tread.
I agree with both Merlin and 'Roo. Although I admit it's at least a bit of a surprise that a Tammy kit would be a problem. They are usually pretty darn good about getting rid of their mould release agent before packaging. But accepting that as fact (because it IS your fact).
Do what 'Roo said, defintely! Reason being is, no matter what you do to the model from this point on is 'suspect'. Very important. Believe me, you do not want to go through all the other painting steps only to have the same thing happen......get the picture.
Now, do what 'Roo says and Strip it!
Wash again with soapy water (using an old soft bristled toothbrush) and wipe clean. Now (because you used the oven cleaner), wipe throughly with a lint-free cloth dampened with Iso alcohol. Let dry. Wipe again.
Now, start your painting process.
hth.
Tread.
redman71
Joined: February 12, 2004
KitMaker: 68 posts
Armorama: 0 posts
Posted: Wednesday, March 03, 2004 - 03:41 AM UTC
Thanks guys for all your feedback...I really appreciate it! Its fun getting back into this after about 15yrs...
redman71
redman71
redman71
Joined: February 12, 2004
KitMaker: 68 posts
Armorama: 0 posts
Posted: Wednesday, March 03, 2004 - 03:43 AM UTC
Dang it one last thing I forgot to ask...how long should I leave the oven cleaner on it to strip the acrylic primer? Or is it one of things that will be painfully obvious...
redman71
redman71
TreadHead
Joined: January 12, 2002
KitMaker: 5,000 posts
Armorama: 2,868 posts
Posted: Wednesday, March 03, 2004 - 03:55 AM UTC
...the latter.
Tread.
redman71
Joined: February 12, 2004
KitMaker: 68 posts
Armorama: 0 posts
Posted: Wednesday, March 03, 2004 - 04:56 AM UTC
Thanks for all your help Tread...
straightedge
Joined: January 18, 2004
KitMaker: 1,352 posts
Armorama: 629 posts
Posted: Saturday, March 06, 2004 - 03:10 PM UTC
Quoted Text
Here in the US. ISOPROPYL is found in drug stores as Rubbing alcohol, or at least that is one name it is found under.Hi there redman
I don't want to get into brand names, because they differ everywhere...
When you say soap, do you mean body soap or pure dish-wishing detergent? You need the latter... (body soap in the UK would be a disaster!)
If you really want to be safe, swap the model with Isopropyl Alchohol ( I think it's called de-natured in the US) before painting.
Hope this helps
Rowan
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