Scotchbrite. Acetone wipe. Spray with an aluminum rattle can primer that has the acid etch built in. Marhyde, for example, or Home Depot Pro Aluminum Primer. Great results, lots easier.
Having painted some 500 airplanes, (now retired)
FWIW, I have had problems with "etch primers" and I have tried several different ones.
My recomendations, FWIW, Acid etch & scotch pad, clean water rinse, air dry, alodyne, applied with a sprayer, air dry, Epoxy primer, Top coat, check the Mfg. recomendations for "Open Time" on the primer. Do NOT wipe with any solvent. A clean enviorment is always best.
It is best to do the steps in quick succession to eliminate the possibility of contamination.
I am sure this will meet with some discussion, it is the process that has given the best results for me, and I have tried them all.
Dick
Having painted some 500 airplanes, (now retired)
FWIW, I have had problems with "etch primers" and I have tried several different ones.
My recomendations, FWIW, Acid etch & scotch pad, clean water rinse, air dry, alodyne, applied with a sprayer, air dry, Epoxy primer, Top coat, check the Mfg. recomendations for "Open Time" on the primer. Do NOT wipe with any solvent. A clean enviorment is always best.
It is best to do the steps in quick succession to eliminate the possibility of contamination.
I am sure this will meet with some discussion, it is the process that has given the best results for me, and I have tried them all.
Dick
Hi Dick
Can you elaborate what your problem have been with Etch Primers ?
Hi Dick
Can you elaborate what your problem have been with Etch Primers ?
For dealing with repairs on finished aircraft, how do you keeping alumiprep from getting between seams? Haven't experimented with it yet, but would painters tape be sufficient?